I've had great experiences with Brenspeed on both of my GTs. I'd definitely recommend a SCT X4 from them.
2007 Mustang GT 302 Stroker, 6060 swap, 3.73 gears, Barton Short Throw, JBA LTs, Borla Touring Axle Back, Lito tuned SCT X4. H&R Race Springs, Bilsteins, J&M CC plates, J&M LCAs, BMR goodies. 4 Piston Brembos
DOB GT450 with VMP Gen II 2.3 TVS | DOB HE & IWP | GT500 hat & DW340s | FRPP 52lb | CMS Stage 2 Blower Cams | Comp 113 Springs & Retainers | 8 rib conversion | Track Spec GT500 Vents | PTFE Heat Barriers