I just ordered this kit:
http://www.4wheelparts.com/Brakes/F...5&t_s=23&t_pt=6401&t_pl=9976&t_pn=SSBA126-37R
found a 10% off coupon, which made it a little more bearable. My decision was based on a few things:
-My denali XL has the 20" rims, but I still want to be able to use my spare if necessary. These are size up discs, but still allow for an 18" wheel.
-I'm not looking for bling, just stopping power, as we tow a boat. The stock brakes are one of the few things I've not been impressed with on my ride. This should remedy that, and I don't see the need to spend the same dough for the rears when the fronts handle approx. 80% of the stopping power.
Will report back once done...