I am happy to say that I have never found myself anywhere near such a pickle. I don't even have a response for such a dilemma.
You know, if you want something similar to the RX-7, The Scion FR-S/Subaru BRZ is actually a well put together car. You'll hear people gripe about their lack of power, but they're missing the bigger picture of amazing handling. They're nothing like the FR-S or the RX-7, but the Ford Focus and Fiesta STs are great cars in their own right. If power is your thing though, and you still want something that's a bit more practical price wise, the new Mustang is hard to beat. Though, I'd probably wait until the 2016 or 2017 model year comes out, so Ford has a chance to work out the first model year kinks.
I like the Mustang, and I'm Ford employee discount eligible, so it's crossed my mind, but I'm just not into muscle cars. The Camaro that's coming out next year is cool, too, but doesn't appeal to me for the same reason. When it comes to fast cars, I'm more a sport coupe enthusiast (ATS-V, M4, RS5, etc). As it stands, I'll only buy a Ford or GM, because I can get discounts on either (not because of any buy American ethos). Currently I drive a Silverado, and there's a strong possibility I'll just end up getting another one, but goddam is it annoying when faced with a small parking lot.
You know, each generation that Mustang becomes a bit sportier, especially this generation now that it has an independent rear suspension. You got a bit of a pricier taste in cars though. Pricier, but still tasteful. Besides the parking, how do you like your Silverado?