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Eibach is your best bet:
a) Suspension will be a bit firmer
b) You will lose the ugly gap and the Gs look good on Eibach.
c) You wont need a camber kit if you go to a good alignment shop and you dont drive spirited. If anything the fronts are not 100% in spec but good enough to not give you tire wear issues. Go over an inch and you'll need camber kits.
If you want only 1/4 of an inch drop I suggest letting the air out of your tires
+1 on Eibach... To be on the safe side regardless of how good the shop is or not, you may still want to pick up the rear camber kit. Last thing you want to have happen is to find out you are too negative and have to purchase the kit and redo alignment again...
Lets not forget that some negative camber is actually a really good thing, because your car will handle like it is on rails. You will just also chew through tires a lot quicker. So...pick your poison...