I recently got a used Kokatat from Kayak Academy and am pretty happy with it. I've been told this brand is one of the easier ones to fix when you need to replace a gasket.

i figure i will mention that the DT REI has a kokatat meriden with pzip and tunnel for like 400 in the used area. it will need new booties but it is a great deal if it fit. it is like new

I recommend Kokatat or OS System suits. They are generally more expensive, but they are worth it in the long run. Not just because they are quality suits, but because they are made in America on the west coast...and do their own service at their shops. So when you need repairs you can send them in and get work done by the people who made the suit, often repairs are covered by warranty too, so all you pay is shipping. With most other brands, they are made overseas with no domestic service, so if you need to have repairs done you are either SOL or paying high repair costs from Rainy Pass.

Also you can get used Kokatat suits from Kayak academy if you want to save some $$$.

Kokatat and Kokatat only.  Also get the booties and the relief zipper.  The relief zipper will extend the life of your neck and wrist gaskets.  A wise man told me once to NEVER chince on gear.  The goes doubly for a dry suit.  You get what you pay for.  I'm on my second dry suit in 10 years of paddlling.  A new one every 5 years seems to be about right for my frequency of use.  I also get new neck  and wrist gaskets about every 2 years.  I get an average of 80-90 days in a year and I'm hard on my stuff.  My old dry suit is now my back up.  If your gasket blows at the put in there is no time for repair but there is time to change into another suit....

KOKATAT!!!