How much money are we talking about for a good link system with coilovers for my sammy?  What would the average costs be for doing it yourself compared to having it professionally done?  My rig has yota axles, tranny, and diff, with YJ springs SPOA, 8"lift.  Or is this not worth the $$$$? Will I gain that much travel?

check out Trailtoughs kit for the sammi.

I run their kit on my sidekick and it's bitchin!

http://www.trailtough.com/index.php?page=shop.product_details&flypage=flypage.tpl&product_id=181&category_id=44&option=com_virtuemart&Itemid=53

Yea it is bitchin, but I have not seen this setup on a tin top in any of their pictures.  It looks like the same one Low Range sells.  Also it seems you have to clip the front and rear part of the frame.  Will I need to get some kind of tub also, for the cliped fenders?  I am not sure how this will work on the tin top?

Has anyone tried the ones from rockroad outfitters?

We built the 4-link for an SJ-410 that worked great.

http://zukiworld.com/forum/build-diaries-how-to-diy/sj-410-rear-4-link-build/

After building that I wouldn't to back to a standard SPOA for a taller lift unless I didn't have access to a shop and had to do everything in the carport.  The difference was amazing and totally worth it.

However, you likely won't get much travel difference over your YJ kit and a good traction bar.