I currently don't own any 1x12s, but did for years. My favorite was the Mesa Mark V. I had a Stiletto Ace 1x12 combo with a closed back for a while, but came to realize the concept was kind of dumb--it didn't add anything over an open 1x12 except for weight. Overall I like 1x12s for their portability, but always felt it was a trade-off vs the sound. I much prefer 2x12s or 4x10s. Of course 4x12s are king, but a PITA to store and lug around.