I'm old school and in my opinion the only lift that is worthy are those that replace the OEM springs and shocks. Lifts using spacers or blocks is strickly for looks and is almost worthless off road.
I was researching lifts too for my Toyota because I was just about to purchase the KORE lift kit
KORE Recon Series Dodge Lift Kit for my Dodge Ram. Now I'm looking for a company to lift the Tundra that does not use spacers or blocks. I think I may be going with FabTech for my lift.