OP,
I read and talked to alot of ppl before I made my decision. Here is what I did, this may not 100% apply to you.
1) Research DIN vs Yoke tanks in your area, what do they rent. yes you can use adaptor, but if you are always using adaptor then not get it they way you will use it.
2) bang for buck Hog D1 single tank is a great setup. I beleive the standard is the coldwater version. What ever brand you get I say get the sealed/cold water version as a absolute requirement.
3) If you buy a name brand that is cold water ready, You will have no worries, so it is really about what company you want to give you money to.
4) Before you buy ask about service policies, once every year or once every 2. Then the cost of the service, carefull on this one as some say parts are free for life, Miss a service just once and you may not be happy ever again, as parts may cost you a arm and a leg. I also beleive that free parts are just hidden into the service fee's. That may just be me as I don't think anything is free.
5) HOg is marketed to the Tech diver, But that is just marketing has nothing to do with if they are good or not for rec divers, just the audience that HOG is trying to get to buy the equipment.
6) There are requirements to do self service of the HOG's, But keep in mind just like all the other regs you can have them serviced by a pro. If you every decide you want to self service you have a route to go. You may never go that way, but at least they give you a path.
7) If I was you, I would get the dive team togeather and see if you can all agree on the gear of choice, Could be benificial for several reasons, discount pricing, Familiar with other gear, Advice to and from each other, Same parts, can borrow from each other etc... And if one of the team does self service he can do it for all.
8) I slightly disagree with Jim on waiting on buying some gear. He may be right, but it is nice to use your own gear in training as you get used to the setup and instructor may correct minor issues for you such as weight and how gear is configured, I.E long hose, short hose, differnt hose routing etc.... Thus it is a big mistake if you do not get into the hobby for any reason, Renting gear for traininng will not cost you that much. but if you are buying gear at the end of training, you will have saved some money and gotten some advice on how to wear it etc....
Personally I went back and forth like 5 times on the Hog Epics or the HOG D1. In the end I choose the HOG D1 for serveral reasons, some of which are. Both seconds are identical, as apposed to the epic that have a preset octo. I beleive them to be more durable and thus will last me possibly the life of my dive carreer. They are officially what is taught in the self service class, although I think you could take the class with Epics, (first stage is the same as the HOG D1). I do have DIN tanks availible to me, and if I decide that it is a problem, I will end up paying a little extra to have the HOGS coverted back to a Yolk tank.
MSRP for the complete hog setup is ilke $449, that is for the first, 2 seconds, in the sealed/coldwater version that also includes the Yoke spin on adaptor. I am sure if you shop around you can do a little better, if you do a team/bulk buy probably a fair amount better.
While I think I may mail my regs out for service if I do not self service, The last thing you may want to consider is who and where is the guy that will service you regs, and how much do you trust them. The best regs out will preform like sh&t if serviced poorly, and even the basic stuff will work good if serviced well.
Given the fact how you want to use your gear, I think that I would avoid a Full Jacket BC and go with either a BI BC or wing setup. But heck what do I know I never have dove a wing yet. Just seams like you would want to be streamline and have very free sensitive movement of you arms and body, without having to worry about Did I bump into something or was that just my jacket.
Highflier