Dude i dont know how you feel about colors but i wouldnt buy either of those vehicles and heres why...
You could probably find them cheaper, theres a brand new body style out, New Edge GT's are going for what like 10K right now? The new body style is sure to drop off fast too.
I would hold onto your money for another year or so... The values will just keep going down. And if Ford really does come out with that 400HP Coyote engine for stangs in 2011, buy that! If you cant afford a brand new mustang, then buy a Termi.... You can find them for around 21-22K now, Im sure they will be cheaper in a year after the new body comes out. Technically the KBB on them is what like 18? though i couldnt find one for that
Now some of these weird people called "adults" or something will try and tell you that a car is a method of personal transportation... Its not, its a status symbol, a phallic compensating device, and most of all a mobile entertainment module. People (myself included) seem to forget that cars are not investments... They are toys, toys that break. Buy them cheap and spend money on them to make them more enjoyable, but always realize that it is just that, and you can do it economically if you chooose the right platform. If i had bought a 5.0 and put some money into it all this time for what ive been paying on my car i couldve bought my car right now and owned two cars and still modded both of them... Hind sight is 20/20 i guess..
If i had the chance to get a divorce from my Comp Orange baby through the powers of time travel i'd def. have bought a fox body or 5.0 SN-95 for a few grand and just poured money into it. Now i am about to have a 22K dollar car payed off thats worth less than 10...
No matter what you get chances are if your on here you wont be happy with it stock for long... Especially with 400Hp GT's, 440Hp Slomaro's, and all the other mind boggling 8/7ths sized monstrosities ... that seem to be completely counter intuitive to the market and a potential fuel crisis... but whatever. They will still be tough, even if they are driven mostly by dudes in their 40's and 50's.
With that in mind, both of these cars are going to be steep to modify one way or another, and your already paying a little too much for the MACH. With the Mach you have to pay alot more than regular GT parts (four cams instead of two etc.), the 3V isnt bad aftermarket but you have to spend a ton on body work so they dont look half retarded. My new edge feels heavy as **** to me... i couldnt imagine how an 05+ would feel.
If you cant afford a Cobra, i would go so far as to suggest getting just a regular New Edge GT for 10k and super charging it for a few grand... Or go N/A if you hate S/C's like me and get some trick flow heads... either way you'd still be below the cost of either of the choices youve mentioned and WAY WAY above on the fun factor scale.... Plus... ones yellow... the color of pee