The best systems I've seen for the 2011-2014 5.0s are the Roush TVS 2300 systems and the Hellion twin turbo. I'd personally go with the Hellion, and I'm sure they'll offer one by 2017 for the 2015 once it's out. You'll probably be looking at 600-1300 horsepower depending on what boost you've got it set at.
2007 Mustang GT 302 stroker 6060 swap, 3.73 gears, Hidden Hitch Receiver, Barton Short Throw, JBA LTs, Borla Touring Axle Back, Lito tuned SCT X4. BMR SP009, Bilsteins, J&M CC plates, J&M LCAs. 4 Piston Brembos
DOB GT450 with VMP Gen II 2.3 TVS | 13/14 GT500 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