for that kind of a drop, you have several options. First option is to purchase only the springs. I think neuspeed sports or eibach prokit fit ur needs. Since it is not a drastic drop, you won't need camber kit, but buying new shocks is upto you. You should if you can afford them tho. With those 2 springs, you wont sacrifice a lot of ride quality even with stock shocks. My prokits feel exactly like stock and the car sits 1.5 inches lower. (I have stock shocks)
Anyways, my suggestion is to get the pro-kit or sports springs and also slap on some koni yellows. U can control the height a little bit with the adjustable perches, so that gives you a little flexibility. H&R sports would have been good, but they have changed their 1.7/1.5 inch drop to a 1.5/1.2 drop, so it isnt much of a drop.