I would not use Audyssey at least at first and just listen to them as they are. Use an SPL meter to level match the speakers to assure that they all have the same loudness in the main seating area, otherwise there is a chance the louder on will always be the prefered or better sounding one.

Here is a link to a large comparison that Mojo(must remember to contact him later this week \:\) ) and I did awhile back for some ideas as to what you can get away with in our non-scientific experiments.

http://www.axiomaudio.com/boards/ubbthreads.php?ubb=showflat&Number=181868&fpart=1

and one more

http://www.axiomaudio.com/boards/ubbthreads.php?ubb=showflat&Main=12983&Number=179405#Post179368


Jason
M80 v2
VP160 v3
QS8 v2
PB13 Ultra
Denon 3808
Samsung 85" Q70