Hapyspaz: A lot of the 6" kits out there are only about 4" with no crank, you crank for the other two inches. That gives you the option to increase if you feel the need.
What about keys? What kind of height do I get out of a set of keys? If I could get 2", I can get 2" rear springs, crank the bars to match height?
I dunno, my girl is like 5'2" and already has a hard time getting to the side step, I think 4" would force me to drive the Acura everywhere when we ride together....