It's all choice, really. BAT won't slam your car, my car has dropped from it's stock SVT height about 1.25" all around. Not significant, but the BAT kit is designed more so for ride and handling. Ajustables have the perks (ability to raise and lower the ride height). BUt, adustable coilovers tend to have a much "firmer" ride. How heavy of a system do you have? Mine weighs about how much my spare tire and jack weighed (removed-useless with current ride height).

2006 Pontiac G6 3900SFI GTP Coupe CAI, Stainless Cat Back, Vector Tune, Strut Brace, Eibach Pro Kit, Custom Made Projector Headlights, 4300K, 20% Tint Former Owner- 2000 "Stryped" CSVT CEG Dragon Run- Oct 13-15