not sure what size to get. the tires will be bf goodrich kdw2. won't you get more understeer with a wider tire? will the tire look too stretched with 245. my car will be dropped with H@R springs but my fenders will be cut

I vote the 255's

wider tires = possible oversteer (front tires grip more than back tires)
you could go with 275's if you wanted!

I just got my Rims and tires today. I went with 275/30/20's in the rear and 245/30/20's in the front. The car handles very very well and hooks great..275's look solid in the rear but the big downfall is the 20's are heavy..........