'Sup, first post here. So I'll get right into the fray...….I recently purchased a gently used 1973x combo, and while I love the sound of this circuit,( I previously had a '74x I had to sell back in '07 for financial reasons), the Greenbacks in there simply ain't cutting it for me. They are nice for cleanish, tremelo'd, 'trippy' stuff up to about 2/3 on the volume dial, but then completely mush out, and lack ballz and volume when I crank the amp and wanna get, for example- LZ's The Rover with my Les Paul. I think it's a speaker sensitivity issue. Those GBs are only @ 96 db. I was thinking something like a Warehouse Green Beret/ Reaper combo might work, or Green Beret/ Weber Silver Bell combo? Any and all help appreciated, thanks!!