I just started IDPA, and it's my first competitive pistol experiance, not a green shooter just green to the game. I shoot a G19(my occasional winter carry gun-OWB), with the usual trigger mods, OWB Bladetech holster/mag carriers in SSP. Im not going the full monty with a G34, handloads, etc.(yet) The G19 is not holding me back, just classed as SS, and it's my skill that limits me, and I plan to fix that. Still got to figure out my dislike of vests...
But I also desire to increase my skill with my full time carry(Sig P290RS), so once a month the local club holds a Revolver/IDPA Intro match based on IDPA rules but downloaded to 6rnds, plus (2) 6rnd mags/speedloaders for the wheel gunners, this is my time to bring the Sig with IWB holster, use weather dependant cover garments(jacket and tucked t-shirt if its cold, untucked t-shirt or light button-up shirt over a tucked t-shirt if it's warmer).
Im lucky to have a club that shoots indoor IDPA matches almost every other week, and the revolver matches once a month. If I din't have this luxery i'd enter twice- once for the G19 and care about overall results, and once with the Sig and care about my performance.