I'm not a fan of powdercoating at all. I'll admit the bikes shown in this thread look pretty darn good, but most I've seen look plastic-y and just plain bad. If I were a doing a frame I'd either rattle-can it myself - which I believe can achieve really nice results if done properly, or have it painted somewhere else. I'm sure I'm in the minority with this view.

The GP is a sweet bike though, good luck with it.