man i wouldnt go any lower than superlow reasons
-will get defected for sure
-will be hard and annoying to drive over anything
- superlows look HAWWWWWT!!!!!
you want to keep it legal as possible for obvious reasons and you dont wanna go around scraping everywhere,my towbar scrapes if i go down awkard bumps,any lower your gonna be doing more damage, jus go superlows all round or even lows, they will make the back lower than the front so i wouldnt worry going any lower in the rear. go to pedders to get it done, jus dont go lower than superlows trust me.