seaskin membrane drysuits are made to order based on your measurements. As such, they seem to fit quite well (a friend has one, mine is on order. I observed no difficulty of motion in his, he construction (as others have mentioned) seems top notch, and with every option I wanted (reinforced everything, wrist dump in addition to shoulder, extended inflator, dry-gloves, quick seal systems, etc) and tossing in a decent number of spares I spent under $1,400 shipped to the US for it. The only downside is the 8-10 week lead time for these custom made suits means I won't have mine until the end of the summer.
Mine showed up this week, about 3-4 weeks earlier than expected. Everything appears to be made of very high quality materials and put together very well (like the other two from them that divers I know use). I'm looking forward to starting to dive it this weekend.