If you are going to be rotating your tires and want to keep them all the same I would go with Toyo TS-1's in either a 265 or 275/35/18. personally I would do the 275's. I have the 275 TS-1's on the front of mine and I love them. They tracked a bit for the first 100 miles or so until they broke in, but now they are great. My car is not lowered, and i have zero rubbing issues up front. I run larger 295/35/18 TS-1's in the rear, again with no rubbing issues, so the 275 would be safe there also. These tires in this size have great traction (with proper tire pressures), and have good rain drivability. These are summer tires only, and you will want something else for the snow (I use a 98 F250 ).
Hope this helps....
What is the stock rims 17x???8-9? I have the stock grey rims that came on GTs in 2000. What size are they? Whats the best tire size I could get on them? I have to wait for rims because i need new tires cost to much to get rims and tires!!