3/4 -1 inch drop should be just fine w/o sacrificing drivability. Putting a lip will obviously make the front end have less clearance so you will probably have scraping there. You should first get the wheels you want then do the drop. you could probably do better this way since you would already know how much of a gap you will have with your new wheels and you can decide on how big of a drop from thereIf you want to lower it/slam it alot, save your money for airbags.