I would go with 17 inch, they are not too big or too small. and are fairly worry free when it comes to bumbs in the road. to get a good feel of how ur car will look with rims. go to tirerack.com and check em out. u can see ur car w/ the rims on them! ( u might have been there) remember, if your goin for speed in the future (or now) usually bigger rims weigh more = more rotating mass which slows ya down
otherwise, your decision. good luck, hope too see some pics when and if u get em.