Thanks for all the imput. I'm thinking that I'll go for the 215/60/15's.
But the other, more expensive, way to go is to just buy new rims and tires. I just need to find some. I'll just have to see.

Thanks.

'99 Silver Frost.SE.V6.MTX Drop-in K&N / Masked rear Reflector st200/Eibach / SVT E1's FMS Wires / ES Rear Bushings