ooooh i didnt know bat can get you eibachs!!!! i definetly have to get that because the BAT kit really isnt that much lower barely an inch i believe, but thats why people love the ride, the lower you go the worse the ride.
and the ebay springs, ive heard good things from the people that have them on an exception of rust, in the winter you have to douse them in pb blaster to change the height, and the rides not that good either, but if you want springs for $60 or whatever it is, you shouldnt care about the ride.