Vince thanks.  I have been on the same boat, and have Dyna's now, and honestly they probably work good for a standard height car, my Musclemaxx just hang too low for my liking.
They were killer for the price, I think you could buy them earlier this year for sub $400  ( I believe friends were paying $300 something for them)?, now they jumped to over $600.
Old pic, but gives an idea on how low they hang when mocking things up on my first gen (Dynatech Musclemaxx and magnaflow after collectors).  That is with a non lowered (almost 4x4 lifted, lol) Camaro on 18's.  maybe I could lift the engine some, but seems counter intuitive 
 
