1. either buy wheels that actually fit and make your car handle well
2. jump on the bandwagon of hellafagness and make your wheels poke, your tires stretch, and your handling and performance suck balls.
Option 2 also costs more because wider and larger wheels = more $ and smaller sidewall tires = more $
what do you want? your car to look super hip cool fad or do you want performance and handling?
also, the further away from stock offset you go the worse your car is going to handle. dont beleive me? try for yourself
just buy some 17x8 with an oiffset of +45 or higher (53 is stock) w/ a 235/40 or better yet 245/40 tire and call it a day. this is the ideal setup for your car.
EDIT*** i didnt notice you had already made up your mind. 2lbs per corner is a NOTICEABLE increase in weight. your car WILL be slower. i was running 17x9 +42 rotas w/255s and it was so heavy i sold it after 6 months for some 5x100 sti bbs. even though i
"downgraded" from a 255 to a 225 tire, the weight savings are worth way more than tire width. its not even funny how much better it is now. that size suck,ed