i have RF-7 fronts, and have used the following for power: nakamichi receiver, denon 2805, cary audio cinema 5, rotel 1080, krell showcase 5, & B&K ref 125.2, and still searching to see who makes the starting line up. best sound for music so far has been cary audio cinema 5 and the cary cinema 6 pre/pro. the cinema 6 lacked several features i wanted, but was a sweet set up for 2 channel & multi channel music. have also spent some time listening to RF-7's w/ a aragon pre/pro & aragon 3000 series amp, which was nice, but i thought lacked a bit when compared to the cary setup. best bang for buck so far is the B&K, which is a great amp for 800 msrp. it's not as clean or as detailed as the krell, and not as powerful as the cary, but also costs substantially less than either.