Is bigger always better? I'm looking at getting a set of Hoosiers for next season, and am torn about which size to go to. I'm happy with my 225/50-14 Toyos which are about the same size as a 205/50 Hooiser. Is there any gain by getting a 225/50 Hooiser (which I estimate really should be a 235/45)?

The car is an underpowered by great handling MR2 at about 2420lbs.