Well,
For what its worth I run the Double D pro.... , I installed it myself.
I have no knowledge of the RK setup, so can not help you there.
My choice was based on what I learned here on WAL and actually looking at the Evo long arms setup on another guys Jeep.
I can not imagine any better quality. The Johnny joint ends are far superior to anything else out there. Read up on them and decide for yourself.
Now as to your question about the "Bolt on" install. Sure it is called a bolt on kit. Ugh yeah right. :cheesy:
You will need to have a well stocked tool box, (should have that anyway) You will need to have 4 jackstands at least 34 inches high. I ended up using 10 jackstands at one point of various heights to hold all the stuff I needed to hold to do this safely.
You will be cutting and grinding a lot. You will have to drop both the front and rear axle sets, you will have to drop the fuel tank, jack up the body from the frame, on and on.
Like I have said before, if you think of working on your Jeep as fun, like a big model then you will enjoy it.
Go back and read my posts about this subject. Highly recommend you do that before you even start.
I will try my best to help you as will several other guys on here.
When you are done you will know your Jeep intimately. If you can get through it without cussing and bleeding then you are a better man than I. :doh:
Several times I wished I had just paid a shop to do it. Once you start you cant really stop and then take it in.
Wished you lived closer as I would love to watch and or help.
Good luck brother.