I think DSS, Oxycheq, and Halcyon have the highest quality plates out there, the fit and finish of them is just superior, DSS doesn't polish to a mirror, but that doesn't bother me and I prefer it, I do prefer the steeper angle of the Halcyon but their backplate is too short for me so I don't have a lot of options. Manta makes most of the plates for the other guys since they bought Highland Millworks a few years ago, Dive Rites come from them, when you are looking between companies like Hog, Hollis, Dive Rite, etc that aren't making the plates in house, it's just find what is cheapest because they are all the same. If you take Oxycheq, DSS, Halcyon, and one of the Highland plates and put them on a table it is pretty obvious there is a difference between them, but if you take the 3 above from Highland they are all pretty much the same.
Wing quality, yes it is true that Hog is getting wings from overseas happened a few years ago, if anyone is particularly interested, I can forward you the email from Jack, there is talk about coming back to US production, but it hasn't gone anywhere passed talk. Their wings are built to the same quality as everyone else getting them from over there which is actually very good, Hollis DRiS Trianta, Scubapro etc.
Scubapro is owned by Johnson, Johnson is owned by Jarden, they also own Coleman, K2, Rawlings, Oster, Mr Coffee, Diamond Match, Yankee Candle, etc etc. Good luck dealing with them.... With a plate or harness you obviously won't have to, but wing warranties can be interesting.
Tobin is Tobin, that's about all you can say, he will be very active trying to help you until you try to step over the line, I can't blame him, he's been burned before, and he's in the business of making money, can't fault him for that. The triglides, OPV's and what not are all actually made in the DSS factory, they have the milling and injection molding equipment in house. The leaking of air from the wings may be due to something other than the wing itself, OPV hasn't made a perfect seal impression yet, might have a slight leak from inflator etc, put it in a tub and find where it's hissing.
As far as general wing stuff, the inner bladder Halcyon uses is superior to the standard urethane for pinch flats and puncture, Hollis uses a thinner inner bladder, saw one get a puncture in a cave of all places last week, the thickness of the urethane will set apart the generic wings from each other, but the covers will all be about the same. Oxycheq has the thickest, but it makes packing the things a colossal pain. Long story short is they all work, they all work well, you aren't going to find any major differences in build quality, it's where you want your money to go and which companies stand behind their products. Hog, Dive Rite, DSS, and Halcyon would be the only companies that would get my money for wings, they all stand behind what they do and are known for it, Hollis does now have a nifty new warranty on their wings but Hog has the same one and it is cheaper.... As far as the bladderless wings there are pros and cons, the pro is they are much cheaper to manufacture, half the labor involved, the major con is that during a normal puncture, the cover of the wing can slow the projectile down significantly and also potentially dull it to the point that it will push the inner bladder in so it doesn't rupture, in a bladderless design that obviously isn't the case and any puncture will result in a failure of the wing. Any time you have a bladderless wing, please carry redundant buoyancy with you.
I like Tobin, I also very much like Lamar, either is a good choice, you can also mix and match with no problems, I like Tobins plates better because of the multiple sizes, I prefer to use an STA with singles and I have a Dive Rite travel wing that I use, with doubles I have an OMS 45lb wing, and use a custom built Dive Rite nomad for sidemount. I'm not a fan of the zipperless design from DSS, but the reality is that unless you're doing a lot of wreck penetration, which I do, then the odds of you having to take it out are pretty minimal. If the Scubapro plate is indeed made by JJ and his crew down at Halcyon, and if you fit the normal plate size, then I wouldn't hesitate to purchase that, same reason that the Halcyon regulators are a better buy than their Scubapro equivalents right now, same regulator, better price. Get that plate and find a wing that you like, there are plenty out there, though the Trianta from DRiS is hard to beat for cost/quality if you want to use a STA. The shape is similar to the Halcyon Eclipse which I still think is the best overall singles wing on the market, I just can't stomach the price for the 2 or 3 single tank dives I do a year
Transplate is a great harness, just a bit unnecessary for most divers, unless you are having to walk significantly distances with your gear on or have really bad shoulder/back issues *where you should be going to sidemount anyway*, then the Transplate is excessive, either the standard one piece harness, or something like the Dive Rite Deluxe harness if you are barrel chested and the one piece harness doesn't follow your body contours should work for most people, they're also very cheap....
Oh, depending on where in NYC you are, if you can justify a trek down to Philly, Northeast Scuba Supply has Dive Rite, DSS, Hollis, Hog, Apeks, Oxycheq, and their own plate in stock, as well as wings from the above plus Manta, Agir Bokk, ATS, Light Monkey, Scubapro, and xDeep. It may be worth the 2 hour drive or train ride down if you want to see the other brands in person