I'd go with the Mach. Best styling of all the New Edge cars, I never liked the Cobra bumpers too much. The Machs just have a unique aura about them that the Cobras lack. Maybe it's because they were only a 2 year limited run.
Like said above, you can always put a blower on the Mach with the money saved, probably even still come out ahead. Dont even need to lose the shaker.
2007 Mustang GT - 5-Speed, Airaid CAI, 4.10s
2001 Mustang GT "Mock 1" - 5-Speed, 03 Mach 1 Swap, 98 Cobra Intake Cam Swap, BBK CAI & Longtube Headers w/ H-Pipe, 4.10s 302 rwhp / 310 ft-lbs
2015 Ford Fiesta - Wifes
1981-82 Mustang Cobra/GT T-Top
1984 Mustang GT T-Top - Bare Chassis
1984 Mustang GT350 - 302 / 5-Speed
1984 Mustang LX - 302 / 5-Speed