I've had all the above. The original quick neck was too rigid. Didn't like it except the quick change part.
I can't do latex. My skin oils just eat that stuff. Don't care if they are cleaned right after every use, I can rot off a set of latex seals in 3 months. The newest suit I got the new version of the neck seal. It is just fine. I have done a quick field swap of a wrist seal and practiced the neck seal. I keep a full set of seals and dry gloves (with the neck seal tool) in a separate seal-a-dive kit. But so far I have not had to do a field neck seal change. I have had buddies who blew a neck seal and ended there day, so far very lucky and it was after the dive. I don't live right next to the water, it is a modest investment in time and money to get to the water. I want every chance to dive I can when I am there. To scratch a whole day because of a seal isn't a little inconvience, it is generally a waste of a good trip. So I might miss a dive, but I will be in the water in a couple hours for the next one. Not the next day, if the glue job works out right. I would keep the neck tite system. I didn't like the original, but I like the current version.
Now the oval wrist seals. Pass on those. There are a lot of better options out there. I looked at all of them at DEMA the other year before picking KUBIs. The oval system only pinholed a seal once and always worked otherwise. But they felt so fragile. I always put massive amounts of care into protecting them. More than should be needed for a dive suit. They were still bulky. The Kubi are sized, you find what size hole you can get your had through and that is as big as you order. 4 different sizes, everyone else is one size fits all. The KUBI in correct size and round are smaller than the oval system. They are metal, with big soft O-rings that just work. The ovals have these hair thin O-rings that you have no trust in. There is no "clocking" of the KUBI. If you run gloves, they just pop on all lined up. The oval system means you have to clock the gloves onto the rings or else they are twisted. I am now happy with the wrist seals and glove system I have. All silicone. don't have the latex rot issues. I have holed one glove with the KUBI so far. Had a spare on the boat with me, if it wasn't the last dive I could have swapped it out and gone out again. If you do the KUBI dry gloves (and I would recommend them) order up a size. My normal glove size is large, and the large glove option fits my hand perfect without the liner. For insulation you want a liner, so I had to order another set of gloves in the largest size. ZORO has the replacement gloves (G17K) for $1.80 a pair, so affordable gloves unlike getting a new set of DUI ZIP seal gloves.
