With the 2015 being a new model there will be some bugs to work out. And initial reviews show the 2015 isn't really any faster than the older models. That's got to be a little embarrasing for Ford. So I'll bet they'll do tweaking for 2016 and beyond. Also, have to see what SVT and the aftermarket does. The Roush version is interesting. All that being said, I'd wait.
2011 GT Premium 6M convertible. Sterling Gray w/401A package, charcoal seats w/grabber blue stripe. Security package. Roush front fascia, splitter and rear wing. Black bullit wheels with 18x9 front, 18x10 rear. FRPP suspension. FRPP x-pipe. Roush axle-back exhaust w/square tips. JLT carbon fiber CAI with custom tune. Carbon fiber engine cover & coil pack covers.