If you want a car that rides and handles well, with a good drop, but isn't adjustable, get the Mugen SS and be done with it. It's a great all around suspension with a good drop. If you want to be slammed or have adjustability for track days, look somewhere else.
If you can't afford these try the A-spec, they perform well for DD but they only drop the car 1" from stock and have no adjustability either.
If you can't afford that you can just get springs but I definitely don't recommend going lower than 1.5" on stock shocks/struts. You can do it, but I can't guarantee how long things will hold up.
I ride on an Eibach Pro-kit with stock shocks/struts and that does great for my needs. If I were to buy another suspension after this it would probably be the Mugen SS since I would probably never take advantage of the adjustability of full coilovers.
I'm assuming you're not going to track your car on a regular basis either.