to add, pay attention to the wheel offset and width. As long as those both are similar to oem wheel sizes, everything will fit the same. If you check out the wheels on a site like tirerack.com for your car, you'll get an idea of what will fit.Moved to Wheels & Tires
The std. size info. for your car is "stickied" in this section, as long as you stick to std. tire sizes to match the changed wheel diameters your overall tire diameter won't change.
Winter & Summer will be very close to identical in revolutions per mile.
Would that be required if I got 16" rims?Posted before thinking on that one I'd guess, fresh wheels/tires would definitely need balancing.
Never thought much for the look of wheels with two bolt patterns myself, if Tire Rack lists the fitment as OK for your car they'll work.