I wasn't too familiar with Hedburg's work, personally. Ron White is on up there for me, especially after having seen "They Call Me Tater Salad". He's just ruthless, very opinionated and outspoken, just not as in your face as Lewis Black, whom my girlfriend loves. I've got both the "BCCT" movies on DVD, and the 2nd edition is loads better, although Ron White's work, you can't appreciate as much when it's made family friendly, lol.
Larry the Cable Guy, I bought his DVD on the cheap, as well. He's better off with the collective, IMO. His gimmick gets kind of stale. He broke character on his "Git-R-Done" DVD, which confirmed my suspicions, especially since he hales from the neutral accented Nebraska. Jeff Foxworthy, meh. Bill Ingvall is television sitcom material. Just too friendly, clean, and mainstream to really get me going.
Dave Chappelle is godly. If you haven't seen his older stuff, like his HBO special, "Killin' Em Softly", I'd highly recommend just flat out buying it.
Do you guys own any of these comics CD's by chance, or prefer actually seeing them? A good bit of Ron White's routine relys on physicality, although both hands are usually grasping a cigar and whiskey, even on stage.