I found this thread a couple days ago, and finally just finished reading it. You've given me quite a few ideas about what to do with my Colorado.
I have a Z71 4x4 Crew Cab that I bought new, and it's still basically stock. I have considered lifting it, and probably will do the TB crank/Add-a-leaf lift.
I'm not too crazy about spending a ton of money on a 4" lift kit just to have to buy new wheels too! I may also do a small body lift, and see if I can get 33" tires on it.
I like the rock sliders, and believe that the ones Trailgear sells can be made to work. They look a lot like the ones you have. I will probably be getting a set and figuring out how to make them work.
Some of the other modifications were simple to implement, but quite useful, so I'll probably copy them on my rig. The scangauge and parking brake cable modification are two things I'm considering at the moment. I also like the CB antenna mount. I am currently using a magnet mount on top of the cab, but I don't care too much for the cable coming in through the rear door. Your mount looks clean, and appears to work well.