Thanks to everyone for your replies. Rugyboogie, Ive been searching the ads for Pass Labs XA60.5 to no avail. Wasn't aware of the Aelph, Zero and will look into them. Charles1dad German Valvet look really nice if I can find a pair used within budget.Mijostyn can't put behind speakers. Got 2 feet on each side and above each unit. Just don't have the depth. Looking for older Pass Labs in good condition as you and Rugyboogie suggest. Plan to run fully balanced system. What Pass Labs preamp would complement the Aelph, Zero?