lexscoob

hi i have recently bought my first impreza wrx i wanted something, anything! with a turbo i have been a true veedubber all my driving life, owning several golfs (mk1,mk2mk3)one being an exellent vr6 highline which unfortunately i rolled down the m4, all ok now though! Anyway ive got an early wrx jap import in black running around 300hp it came with a set of 15" sparco's ,they have to go ive had my eye on a set of oz hydras but i have had increasing difficulty finding a wheel they i like in 16" .oz can offer a range of wheels but they are all 17" will this compromise the handling and general smoothness of the ride and will i have to change sus etc, if anyone could shed some light, that would be great thanks really enjoying the scooby. lex