for nyc ...stay with 18 for comfort and safety ...w/ 19 u lose the comfort bcause the roads are bad and about 20'' dont even think about .Those are nice ,cool ,agressive but u dont have the suspension either the roads .Take my word I had a 3.0 w/ 17''(reallly comfy) ,I upgraded w/ 19'' ..stiffy but nice (on good roads) and then ,I mean for 3 years now I drive 4.6is on 20'' and everytime I drive in ny (almost one weekend per month in the last 5 years) I CRY ...dont get me wrong I love my 20'' rims but for often rides in nyc stay way from 20''.I know the deal