I'm just about to start the first half of an upgrade on my vinyl based system the amp (speakers follow in 6 months or so). The Musical Fidelity A3.2cr pre amp looks like being the one. Ideally Id like to partner it with its brother the A3.2cr power amp but few of them seem to come up second-hand compared to the preamp. My question is what other power amps should I keep an eye out for in the £350 to £650 used range? To join a Linn Sondek LP12/ Akito/ K9 (plus Musical Fidelity MC2 speakers short term).