I run MT ET Street 255/60-15. They fit nicely on stock GN rims (15x7)
Mickey Thompson 3756R - Mickey Thompson ET Street Radial Tires - Overview - SummitRacing.com
You can install 275/60's, but they are a bit too wide for the rim and the sidewalls get pulled inward.
Nitto is best I've used in the rain, however, I'm told the MT also does well in the rain.
My MT wear out after about 2,000 miles, but a lot of those are 1/8 mile at a time.
MT are terrible/dangerous in the rain.
my back rims are 15x10's though....
Mine are 15 x 9.5. Currently I run 275 x 50, am considering 295 x50 for the street.