I need a lift kit

Im looking to lift my 01 Suburban 2500 soon. Im thinking a 6" lift, but might consider a 9" so i can run 37's. Any suggestions for a website where i could order a complete kit? Is 1 kit going to be better than the next? I've been looking at RCD, Fabtech, and Rough Country. I've always been low to the ground, never in the air, so im not too familiar with lifts. Any help is appreciated.

I would go with a Fabtech,BDS,  full throttle suspension. I got a few K2500s duramax at my work with those lifts on em and a yukon 1500 6" fabtech and 325 nittos  sits nice.King off road makes  nice stuff 

Not for sure but i heard that fabtech was about to go out of business...

I would go with bds.  It is the same setup as a 2500 HD right??  Just do a 6" kit, throw a set of ready lift torsion keys in it on the front, and put a taller  block in the rear.  Should get you close to eight without any major problems.  Fabtech and Superlift have both filed bankruptcy.  BDS has the best warranty out there.