Hi, currently listening to a pair of R500s driven by the Rega Brio-R. Music produced by a Mac Mini and send to the amp through a Rega DAC. Have listened the Rega Brio-R/DAC with Spendors, Tannoys, Delis, PMCs, Whaferdales, Epos and Castle Nights, all of them in the 500-2000 pounds range and to...