I have the sportline rated at 2.5in drop but my car didn't drop nearly as much. I'm about as low as jschmid. U will need a camber kit in the rear if u want ur tires to ware evenly although I haven't got one yet and i have ~10k on the tires.. I see some camber wear on the rear tires but its not horrible.

I would also reccomend getting a TL-S rear sway bar and a TL-S upper strut bar. They are dirt cheap compared with aftermarket and perform really well IMO. Expect to pay about $150 total for the parts u will need to make that setup. I looked at a neuspeed strut and thats $100 by itself and sways run for over $100 so aftermarket would definately cost in excess of $200.

Oh if u do get sportline and koni yello (neuspeed or koni) then I suggest u drop the perches right away so u don't have to redo ur suspension if u want a more aggressive drop.