I haven't got a lift yet but if I was going to do a budget lift I would do the RockKrawler 3.5". The reason I would choose that is: 1. Installation should be easier than spacer lift. 2. increase of around 3" versus 2" or 2.5". 3. I feel the front struts don't get the abuse as if it had spacer lift. Important note, the RK forks still abuse the struts in my understanding. Best way as you will see is going w Jeepinbyal and choosing 2.5" or the sweet 4" either choice will be superior to any of the other choices and those are my

Oh and to answer your question if between spacer only, I would do Daystar as #1 choice cause a few people that have them here never complain and back them up plus I think they are the cheapest of the 3. #2 Revtek they have been out for a while and 3rd Skyjacker cause w the technology and experience they have left us w just a spacer option, they could do a better suspension system for KK, yet they haven't. Something to consider, spacer will affect the ride quality.