The Atma-Sphere MP-1 is also a balanced unit that uses 6SN7 tubes for the linestage.
If you are considering the Atma-Sphere MP-3, there is a used unit on eBay right now.
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=14974&item=3095624663&rd=1&ssPageName=WDVW
If you are considering the Atma-Sphere MP-3, there is a used unit on eBay right now.
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=14974&item=3095624663&rd=1&ssPageName=WDVW