TireRack is the best site for looking at your car with the rims, as far as I could tell. But I want that 360 degree tool so I can rotate it around. ;-)
I was going to purchase my rims and tires from them, but ended up spotting a deal for the ones I ended up with at Discount Tire, aka America's Tire, at their web site. It's a pretty good merchandise web site, at
http://www.discounttire.com. There is a franchise near where I live, so I figured out exactly what I wanted, and went to the store for the purchase.
Their prices, in general, are not as good as TireRack, but they seem to have some products at the low end that are not available at TireRack. That's how I found the deal.
I will admit that I really had fun shopping for about three or four weeks, trying to figure out what, if anything, I really wanted. These web sites make it quite an enjoyable exercise, as opposed to driving around everywhere and dealing with salespeople.