After deciding to do a major overhaul to my rig and sound, I picked up a Markbass CMD 121p about 2 months ago, and immediately was taken with the sound quality and really low weight. I dumped my old gear on craigslist, and figured I'd finally found an amp that would be ideal. A week ago, with hard-earned commission dollars burning a hole in my pocket, I was back in GC with my combo in hand to try out some ext cabs. I was really impressed with the NY 151 Randy Jackson signature cabinet, and got a deal on it. After a week of playing nightly through the 1X12 combo and 1X15 cab, I now agree with the conventional wisdom 'round these parts that mixing cab sizes like this would max out my excursion on the 12 long before the 15, ultimately making this a nice, but now somewhat unreliable and kind of expensive rig for what I could really expect. If I had to choose between the 2, the 15 wins by a mile. Super lightweight for the size (37lbs), and low end for days. Turns out I'm more of a 15 guy than I thought. This morning, I'm going back to GC with my CMD121p in the original box and packaging, and trading up for a nice Markbass head. Am considering the LMIII or the Randy Jackson Signature TTE 500. Input?