I personally run pro comp myself, however i did not opt for the stage 2 kit, it is a wonderful kit however i wanted to obtain close to an 8" lift so i used a stage 1 kit and upgraded the front shock to a procomp zx-2014(very similar to bilstein except it only has 2 setting 0" and 2.75") and the i upgraded the rear shocks to prorunner zx-2001 and used a 1.5" rear coil spacer to have a little bit of rake.
I would prefer pro comp over rcx but rcx makes a great kit to it all depends on what you are after if you use the procomp kit the have a 4.5" strut spacers vs rcx 5.5" strut spacer, if you use adjustable with a procomp kit do not under any circumstances use the preload stut spacers.
I also have procomp stage 1 and stage 2 kits on sale right now 10% off already low prices with free shipping anywhere in the 48 lower states check it out.
If you have any other questions feel free to ask. I am always willing to help anyway i can you can also call me if you want my contact info and the info about the procomp stage 1 and stage 2 kits can be found here http://www.ramforumz.com/announcement.php?f=246