I read your post. There is one that is available for audition virtually nowhere that isn't on your list. I'm not one to usually use an amp on stage, but on a whim I bought an Ashdown CTM 300. I thought I'd just buy it, model it in my Kemper, and sell it on. The problem is it sounded so wonderful I think I'm going to keep it. If you're looking for a simple tube amp, I'd recommend considering it or one of its smaller CTM cousins. It is much smoother than the American offerings of 300 watt tube amps; creamy and not as rude sounding, which is a personal preference. As for cabs, I've tried it through several and it sounds wonderful through anything I've tried to date. (I've not yet tried it through a sealed cab, but it doesn't sound like you have room for a 610 or 810 sealed cab anyway.) It's as simple as they come. It doesn't have the widest range of tones and leans toward the darker side, but those tones it has it does well. Just one reporter's opinion...