If you're considering going back to the 05-09 body style, then I would recommend you look at an 03/04 Cobra.
The 05-09 is too pudgy and nice looking. The only new Mustang I would buy is the 10/11 body style.
If you're going to spend $28K on a car, then an 03/04 Cobra is going to be a hell of a lot more performance for your money. You can find them with under 10K miles for around $25K.
1993 LX Coupe
Show: Front 18x9 Black Bullit wheels, Rear 18x10 Black Bullitt deep dish wheels, Cervini's 2.5" Cowl hood, Autometer Phantom 10K tachometer, Autometer Ultra-Lite carbon fiber FP gauge
Go: GT40P Explorer motor, Edlebrock Performer intake, AFM 4" Power Pipe, TFS Stage 1, ProForm 1.6's,Granetelli 24lb MAF, MSD Blaster Coil + distrib, Taylor Pro wires, UDP's, GT40p long tube headers, o/r 2.5" H pipe, 2.5" cat back w/ Flowmaster 10 Series mufflers, 3.73s