Or even better mate the H&R sports to Koni adjustables, or Bilsteins. I have H&R sports with Koni's and they are great. Decent drop, still livable, nice balance of handling and ride quality. If you are unsure on the amount of a drop, look into coilovers like Tein, Omni, etc.

As far as Eibach Prokit goes...it really probably won't lower the rear more, but due to the higher wheel arches in the front, you'll still have more wheel gap up front, but that doesn't mean it's higher in the front. Most cars have more wheel gap up front to allow for the movement of the front tires. When you decrease the amount of gap, then discrepancies in front and rear gap becomes more noticable.

And whether or not you rub will depend more on the wheel offset than anything else. Get too low of an offset...you'll be rubbing even with a stock suspension. If you want to guarantee no rubbing and can settle for 17" then get OEM wheels. The Honda/Acura gunmetal 5 spoke wheels are very sweet imo. Just be glad you have 5 lugs...we 4 luggers don't have such nice larger OEM wheel options.