I have a Mobby's trilaminate drysuit, which is front entry, and I like it a lot when it's not leaking Unfortunately, Mobby's is not currently distributed in the US, as far as I know, so that information's not very helpful.
I can weigh in on undergarments, though -- I've tried the DUI fleece and the Weezle, and ended up buying the Diving Concepts Thinsulate. The Weezle was somewhat warmer, but I couldn't cope with the buoyancy issues of having that much trapped air. The DC is warm enough, and has, more importantly, kept me warm now in two drysuit floods, one a major one. In our now 48 degree water, that's impressive, at least to me. I consider the jumpsuit and vest to be two of the best value-for-money purchases I have made of scuba gear so far.
I can weigh in on undergarments, though -- I've tried the DUI fleece and the Weezle, and ended up buying the Diving Concepts Thinsulate. The Weezle was somewhat warmer, but I couldn't cope with the buoyancy issues of having that much trapped air. The DC is warm enough, and has, more importantly, kept me warm now in two drysuit floods, one a major one. In our now 48 degree water, that's impressive, at least to me. I consider the jumpsuit and vest to be two of the best value-for-money purchases I have made of scuba gear so far.