The 20 inch's increased weight could only hurt handling, not help. And as you've already implied, bigger size = harsher ride. The recommendation against bigger/heavier wheel is uniform in any race/performance oriented forum. But I know, if you like the look, it's hard to resist.

IMHO, it's better to stay with 19. This is how the car is fine tuned/developed, and the P40 does look pretty darn good at that size. Hope this helps.

Addendum: Oops I see now Crash and Stradale are discussing this already. Never mind.

Quote:
Alex_ said:
If I get 20" HREs, will my ride quality vastly decrease?

A reseller here is telling me they will help handling, especially if I have 12" rear widths (standard Turbo rears are 11")