I’m pretty certain I’ll go with the si-tech oval wrists, but I’m still completely uncertain about the neck seal. I’m not worried about changing a seal on the dive site. I’m more worried about ease of donning and comfort while diving. Any suggestions?
Also @lexvil do you have the neoprene socks or integrated boots? How do you feel about the flat pocket?
I have not yet actually tried a neo neck seal. I agree with lex that I would never go back to latex. I think silicone is way more comfortable than latex.
My understanding from people I've talked to who have used neo neck seals is that they are a little more comfortable than silicone, and warmer. The tradeoff is that you are more likely to get a little trickle of water down your neck with neoprene - mainly if you really turn your neck sharply or something like that.
Donning is just a different story between silicone and neoprene. I have put my replaceable neo neck seal on (without attaching it to my drysuit). I'm not sure either is easier to don. They're just different. I think the neoprene requires less care. I.e. I think it would be easier to damage a silicone neck seal while donning than it would be to damage a neo neck seal.
I'm not too worried about damaging a neo seal and needing to suddenly replace it at a dive site. When using silicone, I would definitely be worried about that. Since silicone is not available as a permanent, glued-on seal, that sort of answers part of the question. If you have silicone, you WILL have a quick-change system of some type. And you SHOULD definitely have spares on hand. The very first time I dived my Waterproof suit after I got wrist rings installed, with silicone seals, I got a tear in one of the wrist seals. I was happy to be able to change it out in minutes right there on the boat.
For neo, my gut says that when a neo seal needs to be replaced it will be something I will see coming as it gradually wears out and gets looser and starts to let me get a little wet and then a little more wet. I think it's a fairly low probability of a sudden or catastrophic failure, like you could have with silicone or latex. Not saying it can't happen with neoprene, just that I think it's much less likely than with latex or silicone.