dedicated line is a good idea. for amp conditioning, i'd suggest the vans evers unlimited - it won't degrade the amps' sonics; may even improve them a hair. re: getting odyssey monos, i'd suggest getting another stereo amp & running in a wertical bi-amp mode. doubles your power, ya still have a different amp for each speaker, & ya got a separate channel for each driver. kinda like 4 monos on the cheap... ;~)
doug s.