So I'm going to come right out and say it; I don't think the looks better than the one it replaces. The previous generation just seems cleaner, more classic. If you feel the same way and want a unique pony-car with a crap-load of power, check out RS3.
The Roush Stage 3 comes with a supercharged 5.0 V8 putting out 545hp and 485tq. Also included are a number of cosmetic and handling upgrades. Some say the RS3 was the perfect combination of the BOSS 302 and Shelby GT500. According to the Ebay listing, this car has 24,908 miles and a buy-it-now price of $36,900.
And here is the interesting part...most Roush Mustangs have a unique serial number. This one just says "Prototype."
A 2015 GT Premium with 435hp is going to set you back $36,925 before options and in a few months the roads will be crawling with '15 Stangs. But I bet you will be the only one in town with this Roush.
(H/T to Cherry_man1)