I'll answer both above questions in one reply. Not trying to hijack Ldworet's original question. Sorry friend...
Magfan-I don't have them filled, but they are anchored to very heavy carpet by the brass points which dig deep down into my carpet. They just don't move or ring due to their weight with Mye's stands.
Hifi - VTL 5.5 Pre with NOS RCA 12AX7's, DNA-500 amp(silver HiFi fuses) with Synergistics master power cable, MIT Shotgun S3 Bi-Wire speaker and IC's, Cardas jumpers on 3.6's w/Silver HiFi fuses too, Benchmark DAC with balanced IC's to amp, fed by Squeezebox Touch from Win 7 PC with FLAC as main source, Technics 1210TT w/Denon 103 cartridge for vinyl. Room is 13x17x9 with lots of ATX(Richmond, VA) room acoustics tuning used. Maggies are about 3 feet off front wall, 8 ft apart, 3 feet from sides roughly with listening chair at about 11 ft. Not exact measurements. I just built this house/dedicated audio room in the last year. Might be too much for this new place. Old room was 14X21x8.
Happy listening....