Emergency Tire Question.

I had just got a flat in one of my tires and need to order new ones asap.The thing for me is , i use my car for everyday driving. will the 315's affect the car since i drive everyday, and also i was thinking of going 255's in the front just because i heard that 275's will rub.
 
The 03 Cobras comes from the factory with 275 front tires. I can't see them rubbing. Tracking might be a problem though but it's still better than tires that are too narrow for the wheel. I really hate the look of the 245 I have on 9" wheels. I wouldn't go smaller than 265 on a 9" wheels

Besides road noise and the price of these damn tires, I can't see any downside to daily driving on 315. It will look mean ! :D