Buy what you can afford. If they were priced the same or if money was not an object for me, I'd get the convertible.
Since money is an object for me, I say buy the coupe and put that 5k towards modifications and holy crap you will have one of the baddest mustangs on the planet.
A v6 Premium convertible coming in at $31,310 would be tuff for me to swallow with a base GT coming in at $29,310. Just saying but to each their own which is why Ford makes 11 freaking models of this car. Way to many IMO
15 F22 M235i, JB4 Stage II, Cat delete, CAI
12 GT Prem 5.0 (Sold)