Balanced Low Power Tube Monoblocks?

Quicksilver is a brand that interests me. Their products are well regarded, and their pricing is reasonable, IMO.

I looked at them hard before purchasing a pair of VAC PA90 (45 watts triode & 90 watts ultralinear). Sent them to Kevin for service and upgraded to their D series with balanced imputs.

Not to long ago i was looking for amps along the same lines you are, I ended up buying the Manley Snappers. Might want to put them on your list.

Tvad those Audio Valve 60 watt monoblocks might work for you;I think they are a balanced design but not 100% sure;might be worth checking out.
I have the Challanger 180 monos and they are just fantastic
driving my soundlab M2's.
Auto bias circuit that lets you run el34's,6550's and kt88's ;you can even mix then up it you want but I have not tried that as of yet.
Presently using JJ kt88's with very nice results.

Tvad -sorry but I just noticed the 60 watt mono's are only RCA's;the challanger line is fully balanced but high power;sorry for the error.