I thought you would want as little profile as possible on a track car. More profile = more sidewall flex. You can fit the same tyres on a 17 x 9, 17 x 9.5 and 17 x 10 so you won't have trouble finding tyres for a 17 x 10 rim. Your better off deciding what size tyres you want to run for the track and then picking rims to suit that.