The only answer is the EVH5150III 4x12 100W straight cab, paired to the 5150III Mini 50W tube head, and massive footswitch. It's mega watts, and it takes three men and a boy to haul it in and out of the gig. But it pretty much meets all your stated goals. Except for the 'small' bit. And the 'combo' thing. But other than that, it's perfect.