Many folks choose Aerostich. Hand made in USA, and refined over the years by input from us. There are two ranges of suits in one and two piece.
There are tons of threads on other boards about riding suits. The AdvRidres.org ( or com) is a good site as those guys just don't just ride in there suits, they live in them for weeks at a time. The Aerostich line in not cheap, but you get what you pay for.
Check out the Aerostich site for how they make their stuff, it is educational, and not all sales pitch.
When I wear my'stich suit around here, people look at me like I'm an astronaut or sum such... lol... Having been down once, I am glad I had the suit on and I am happy to look like a geek in my suit, because I can stand up on my own, after the fall..