lowering kits

I have on 04 TB LS. What are my options for lowering? I'm thinking of a 1-3. Not slammed, just a little smoother. Who out there has done it? What parts, costs, advantages, disadvantages can be suggested?
also looking for 20's if anyone selling. Thanks for advice

quite a few folks are using the ground force kit

http://www.stylinconcepts.com/parts.cfm/partfamilyid/1331/CategoryID/30/SubCategoryID/206

this is what i'll end up using if i ever get into a TB :grinyes:

Just wondering if any one installed lowering kits with 22'' tires and whats the experience like. Is your ride smooth??. Came across this site http://store.streetbeatcustoms.com/bel141.html which offers lowering kit 2''-3'' with active shocks. Any idea ?