Edelbrock vs. Ford Racing Supercharger

I'm looking to add some reliable horsepower to my 2008 GT.
Has anyone installed an Edelbrock E-Force supercharger on their GT? If so, what is your opinion? It doesn't have much boost but it claims to be very efficient and I'm sure the tune is conservative.
Has anyone installed the Ford Racing M-6066-MGT550 supercharger? Opinions on it? It's probably the most likely install to have the least modifications so it can be removed if I or another owner wanted to. Also, the included tune is probably conservative as well.
Lastly, does anybody have a link to the installation instructions for the Ford Racing model I mentioned? I would like to see what kind of hacking is involved.
All input is appreciated.
Thanks

jpplaw said:

I have an E-Force on my 2009. Installed it myself. I am running a Brenspeed Stage 1 kit, which uses a 3.5" pulley (7-9 lbs boost). I am using GT500 fuel pumps also. Pulls like a freight train, Its been on for over 20k miles and 2 weeks ago just dyno'ed at 474.55 rwhp, 434 rwtq (I do have detroit rocker cams and kooks headers too). 20 mpg average. I love it. I don't know anything about the Ford Racing Whipples but I am sure they are great too.

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Thanks for the info. They both look like good kits. The Edelbrock installation instructions looks like there's a bit of wire splicing and cutting/grinding, no big deal, but I'm still looking for the Ford Racing instructions to compare. I would still like the option for me or the next owner (if there is one) to return the car to stock. I'm not looking for huge HP at the track, actually it's not likely the car will see the track more than once a year. I'm looking for reliable hardware, conservative tune, minimal hacking of the car, and of course a little wow factor under the hood.