The folks at Discstalker are great to work with. I haven't had any custom prints done, but the Glow Teebird they printed for the last tournament was pretty cool, and they have a good selection of discs in the store. I have definitely taken advantage of my 25% in-store discount (hard-earned through plastic purchase). They also do a lot of support for local tournaments.
Discraft - Dynamic Discs - Innova - Gateway - Legacy - Millennium - Westside - Lat64