Hmmm... That's a possibility. Definitely worth a shot at that money.
The very first Marshalls were
based on the Bassman head circuit.
I thought the Bassman had a even higher wattage rating than the Twins, though... I could be mistaken about that, though.
But you may have to go British if that's the tone at the level you want. 50 watt EL34s may do the trick.
You may want to ask around here.
These guys are OBSESSED! You'll get a thousand answers if you post that question there. I signed up a while back... but I felt like a total gear noob there, so I really don't go back that often anymore.