Blow roush, in a good way...I am not a big fan of the Mach one but that is me....the roush looks alot better IMHO, and even though it has the 16V engine, a blower would make it a helluva lot faster than a mach, with the top up anyway..
Roush all the way.... a Mach 1 is cool... but a Roush is a Roush man!! Those turn heads like crazy, they are pretty special cars.
Plus nothing beats cruising around at night with the top down.
PLUS True blue is a nicer color IMO.
PLUS... it's a ROUSH!!!
You said the payments are the same, but you should be halfway through paying off the Roush. You'll start over with the Mach 1. Keep the Roush. When you pay off the loan, keep the payments going into a blower fund. Get a blower.