I have a Predator trilaminate suit and am very happy with it. Have just spent £500 on refurbishing it and Dennis has done a cracking job on all the wear and tear it’s had in the past five years. I consider it a lot cheaper than buying a new one, hoping to get another couple or three years out of it.
For advanced diving, it seems the wreck crawlers prefer the O3 compressed neoprene suits, whereas the other tech divers prefer trilam. I like the way trilam's so responsive whilst diving, but you do need decent underclothes.
A heated vest is really useful for decompression hangs in cold water. A simple aftermarket fit to swap the inflator. Batteries are very expensive though.