Roryfan, you will find the AES-3(Audio Electronic Supply) tubed preamp one of the best bargains under $500 used. These can be found used here on Audiogon for close to $400 (factory assembled). Dynamite preamp from Dennis Had owner of Cary. The AES-3 uses 6SN7 tubes that make tube rolling a joy....
Kek
Kek