Have 20" I-forged Daytonas on mine - they have been fine driving thru the awful streets of B-more... Track times / handling were similar to the 19s... Haven't noticed any diminish in ride quality or performance, however the appearance is much better!

 

Stick with the 19" wheels and lower the car a little if you want the fill the wheel wells better. 20" wheels hurt your handling and ride quality and don't really look any better than 19" wheels IMHO, and can actually look worse. I'm not a fan of the rubber band tire look.

 

19"

 

Go with what your Eyes, Heart and then Mind tells you.

 

I went with 20's. Never looked back. Very strong. These are champion Motorsport RS128's. 20x8 front, 20x11 rear.

 

For all the 997's running 19's, what width did you guys go with on the front and rear. Also, could you post the tire size. I want to go as wide as possible w/o having the car look awkward.