The cab I use now is a Boogafunk loaded with a Jensen C12K.
Hey I have been wondering for a while why you went with the C12K, Iv'e have never heard one in person, but it just doesn't seem like a normal choice for the music you play (Based on the Youtube clip you posted). what is the general character if this speaker ?
The speaker is actually pretty dark. What turned me on to the Expresses in the first place was when I played it through a Mesa Thiele with the Celestion. It was really dark, but smooth. VERY smooth. Not to mention pretty articulate. I hate the sound of V30's. Way too harsh for my taste. The Jensen C12K is pretty dark too and I prefer it to the Celestion, which in retrospect was pretty muffled at times. I really like it though. Come to think of it, I need to try out a lot of the amps I dubbed as "not my sound" because I played them through V30's.