Thanks guys for all of your input. I am very concerned about handling, but I just assumed that once the car is lowered, riding comfort is comprimized. I just don't want the tires to rub when a dip is hit. Depending on the dip, my tires currently rub even though the car still has stock suspension.

As far as the offset of the wheels, I wish I knew it. I bought the wheels from another Civic owner, so I assumed that the wheels would have the correct offset. They do not stick out beyond the fender wells.