Well I'm going to shoot fairly low with a Valvestate recommendation. I bought this 2nd hand Mk II Valvestate VS65R. https://www.richtonemusic.co.uk/pro...ate-vs65r-with-cover-2nd-hand-ymarshall87941/ They are cheap (mine was £69, with a cover!) and small (20 1/2" W, 18" T), but may be difficult to find (1997). It is officially a Solid State 2 channel non-MV amp, but the single 12AX7 in the preamp is part of the signal chain in both channels. Also, the FX Mix knob for the series/parallel loop can be used as a reverse MV if there is nothing connected to the FX loop. 0 = fully parallel (full volume), 10 = fully series (volume off), so it can be used very quietly. If you just want a cheap, quiet Marshall (and it sounds like a Marshall) for late night practice, you can't go wrong.