JL - you are wise to eliminate the Skyjacker - a buddy of mine has one and is sagging quite a bit. I have posted several opinions on the Rubicon Express kit. I have the 4.5 inch lift on my 78 CJ-5 and it is without a doubt the best kit on the market. I have had it around a year with no sagging. It is a complete kit - you will not need another thing to lift your Jeep with this brand. It is of the more expensive ways to go - but you get what you pay for. I off-road often and the perfomance on and off-road are without complaint.
Jeep - its a job - not an adventure