315s will fit without fender rolling or modifications, you can go wider but you will need a small hammer and fender rolling.
radials tend to have a real tread design and have actual use on the street. a slick has no tread(or barely enough to be DOT legal) and highly advised against using on much besides dry pavement. if your car is daily driven, i would say get a street radial. Drag radials will not last nearly as long as a street tire, nor be as good in inclement weather. Just ask the guys on the mickeys about MAW driving from here. however, if you are set on a DR for a daily, i would say get the nitto 555R. From what I ahve seen, tehy will last the longest of the BFG v MT v nitto.