Old member here, back with a new car, a 2012 Mustang 5.0. In the past, I had a h/c/i 1995 Mustang GTS, an 03 Cobra and a C6 Corvette. My 03 Cobra had a JLT, 2.8" pulley, Steig Stage IV ported blower, cat-back and tune. With an aggressive tune, car made 480rwhp/460rwtq SAE or 500rwhp/480rwtq with ice in my aftermarket intercooler. IMO, the 03/04 Cobra is a mediocre car wrapped around a fantastic engine. That's obvious based on its origin. I later moved to an 05 C6, better in every way than the Cobra. Ran a 7.8X@92-93 with 400rwhp in the C6. Ended up with 450rwhp/407rwtq SAE after a custom cam but unable to better my times in the 1/8th, ran a 7.9X@94-95.
So last week, I bought a new 5.0, was not planning on it, didn't think I'd come back to the Ford camp after the C6 but I tell you, this is one hell of a car, especially for the price. Nothing wrong with the 03/04 Cobra, very easy to make tons of power for cheap but the 2011+ Mustang is overall a better car IMO. I rate the 5.0 up there with my C6 in terms of quality, speed (LS2 at least), etc. I bought the cheapest GT as well, $30k minus $4250 military rebate.