$30 is almost RS4 territory, just saying.
The new Buick Regal turbo I wouldn't mind having. It will fill that German car hole you have, you know power can be boosted to at least match what the Opel Insignia OPC is making, 325hp, the OPC is in the same class as the S4. Too bad its FWD.
With that being said, I'd probably buy the Mustang if I was looking for a performance car. In reality, I'd just buy an older car, b6 S4, e46 M3, rs6, whatever, and have some cash left over and have something that I think is a better car.