The Gatorback is a really good high performance tire. If I had a set of 15 inch rims that I liked then I'd probably pay the $1200 for a set of Gatorbacks that fit.
I suppose it would be possible to find a set of 17x7 rims complete with tires for $1200 too, but the look might not be correct.
I used to make a kit to put the 17 inch Mustang Bullit rims on a Mopar. I really liked the look of those wheels but a lot of people thought it was a sin to put 17 inch rims on a Mopar so I didn't sell very many of the kits.
I put 17 inch rims on my early B body back in the 90's and most people back then thought I was a fruit cake. These days there are more people in the Mopar hobby that can handle seeing 17 inch rims on an early B body. The last car show I went to I didn't have any negative comments on the rims. Most people thought they looked good and only a few people even noticed what size they were.
I was one of those back in the 90's that larger wheels and tires looked wrong. Then I drove one with larger wheels and tires and I said wow this is nice. What was I thinking before, are tires for looks or for driving experience. I have never looked back.