I put 205/40r17 on my truck. The wheels are 7" wide and the sidewall of the tires sits flush with the rim. The only considerable difference is the price of the tire really and that probably isn't but a few bucks.
nothing rubs...but I haven't lowered the front either. These tires are only 10mm wider than the stock S-Runner rubber, but quite a bit stickier. The rims are 1.5" wider though, and offset mostly inward. The wheels stick out only about 1/4" more than the stockers.