Jonas, and everyone else, I'm running Bilsteins. This is the shock Max ran for a while on his setup. It's almost identical to the Tahoe shock, but it comes with an external bumpstop and it's about a 1/2" shorter. I like it.
I set up Mike (M Hankel) with a pair of bilsteins that fit the DJM arms and if I remember correctly, they were very nicely priced too. I don't remember the part number though.
I'm not sure if you had an opportunity to browse this thread:
http://www.tahoeyukonforum.com/forum/showthread.php?t=41144&highlight=bilstein+DJM+arms; but there was a bit of debate on which bilstein shock to use w/ the DJM arms. I ultimately gave bilstein a few calls and determined which would be the best for a lowered application.