I recently heard the BM15A and instantly fell in love with them. Because I want to build up a surround setup, 5 active modells would be to expensive. So what about the passive modells and a quality hifi-receiver. Or 3 inexpensive poweramps e.g. Alesis RA-500. Does that make sense? Are those Alesis amps better, or should I prefer for example a higher quality Denon Hifi-Amp? Thanks