Why would you spend an additional 10 grand for a mustang but yet worry about oil changes and "maybe" a few dollars for repairs. That much money will buy alot of tires, oil, gas, and incidental repairs.

I own two crossfires, one n/a and one SRT6. many miles and no problems that have cost me anything.

As you say, the choice is yours but I can't see you going wrong if you really want one.