Just came back from JazzFest in New Orleans, and the venue I played at had all Mesa Boogie bass amps. The first night, the stage had a Carbine M9 with two 2x12 Powerhouse cabs. I just couldn't believe my ears. I've tried and owned Eden and SWR, played through many G-Ks and vintage Ampegs, and currently own a Markbass/Schroeder rig, but this thing was just incredible. Thick and punchy, super clear but still with a slight edge, and loud. The next night I played through a new-generation Walkabout with a 6x10 powerhouse. Equally amazing and that combination sounded very similar to the the one on the previous night, although the Walkabout seems a bit warmer and old school - but I did like the M9 even more. I ran out of headroom a bit toward the end of the set when things got heated, but it was just complete tone nirvana. With a passive P-Bass is was just heaven. Sad part is that I could never bring myself to carry equipment that weighs that much at my regular in-city gigs. But I also realize that there is no substitute for well-implemented tube circuitry and big cabs. My Markbass LMII and Schroeder 2x12 setup sounds amazingly loud for it's size, but I think I'm missing anything happening below 180 hz - it's like half of the sound is gone, in comparison to the Mesa. . . I've also tried Hartke, the Genz-Benz Shuttle, etc, etc, but nothing has come close to these Mesas. Oh, well, when I make it big and have a roadie I'll make sure to get a Mesa rig, so I can smile every night.