It'd be mostly for range use. The only competition anywhere near me is IPSC, but I wouldn't be able to get out too often, so mostly just use at the range. Reliability is important, but I've mostly heard good things about both of these guns (I read just one report of the GP6 breaking a lot of firing pins, anyone able to confirm or deny this?). I had a chance to try a 75B at the range, and it felt pretty good in the hand. I don't know anyone that has a GP6 to try, but I would be getting the new model with the interchangeable backstraps, so there'll be some adjustability. If anyone has experience with both of these I'd appreciate any input. Thanks.