I use VTL MB250s and 300s with my 1.7s and 3.7s.
They have an addictive sound quality.
I purchased both sets used and one had a bias pot go bad (they're not the most wonderful things) which took out a tube and the other one had a cold solder joint or two when I bought it.
I got those problems taken care of and all's well for the past few years.