Four REL'S ? - - - MUST BE A BASS FREAK ! Don't know what your taste in music is but the Magnepan LRS, .7 , or 1.7i are incredible. Another huge step toward live reproduction. With even 2 properly matched and balanced REL's, it would be worth moving on to a somewhat higher power amp. Actually " MAGGIES" like amps that can yield around 45 amp output current, or better to really open up. A pair of LRS speakers are only $650. The money you save plus trade in should cover the purchase of higher wattage (high current) amp. Plenty of fine amps out there, possibly previously owned. A higher power PASS LABS would be wonderful but a little pricey.