M20 vs m30 as left/right

sril77
sril77 Posts: 1
edited March 2010 in Speakers
gurus,
Have got M20 as left and right speakers with cs1 as center. Thinking to buy monitor 30 bookshelf pair and psw10 sub woofer for complete 5.1 surround. Need advice... Read that monitor 30 bookshelf are very good as left/right as they support Bi-amp. In this case is it advisable to use m20 as surround and use monitor30's as mains (left/right)?