I second Bombaywalla's JoLida recommendation - not to dismiss Cayin or PrimaLuna. Have had a 502B for years now. It was my introduction to tubes and I am very happy with it. It has been very reliable. Yes, bias is manually adjusted but that is not a big deal. Upgrading tubes has taken it "up a notch". I'm not associated with BBW in any way but think his offer is worth exploring.
