" If anyone has suggestions as to a "low-priced" tube amp that might give the KEFs a somewhat warmer sound I'd be willing to purchase used and then move up the chain to a higher-end amp if things work out."
It doesn't work like that. What you're doing is like thinking about buying a Corvette, and test drive a Mustang instead, thinking it will be close enough.
It doesn't work like that. What you're doing is like thinking about buying a Corvette, and test drive a Mustang instead, thinking it will be close enough.