Lol, the OP is looking at a $500 lift, plus $100ish for a body lift, and the reply is to tell him to buy a $2600 lift instead? But there is a code for 10% off, so I guess that evens it out some...
I agree that 37's aren't big enough for 6" of lift plus flat fenders, though. But if that's the look you like, go for it.
If you want the cheapest lift on the market, go for that, also. But you might spend a few minutes doing a little reading on Cam Bolts and Drop Pitmans so you know what you will be getting.
Most wheel spacers are around 1.50". You can find some 2" if you look around (maybe wider? don't know). Stock rims are somewhere around 6.25" backspace. Minus that 1.5 - 2", gives an effective backspace of 4.75 to 4.25". Don't count on that being low enough for 37's. (3.5" backspace seems to be a common recommendation for 37's). So while you are looking up cam bolts and drop pitmans, you might also look up how to add washers to the steer stops to limit the turning radius.