Nolitan,
I never had a SINGLE VK 60 driving the Avalons. Only the 60 monos and at 120 watts per side, they were glorious.
BTW, if anyone decides to look for a pair, try to get a later serial #, i.e. last numbers in the 400+. The number refers to the boards. You can always call BAT and speak to Viktor. He can answer questions with regards to repairs which may have been done by BAT.
I once purchased, and returned, a 60 which was severely damaged with rust on the boards. Viktor said he's seen this on amps which were used near a coast. The one I refer to was from Hawaii.