My personal small cab of choice is an MAS-16. Coming in at 14 lbs., that's the smallest amp I own, but it can keep up with a reasonable drummer. Heck, I used it at a ~20 piece big band rehearsal a couple months ago and it kept up just fine. But it's probably overkill for your needs, it's more costly, and they can be pretty hard to actually get your hands on.
Just got one last week. Snapped it up at $200ish shipped. I am amazed at how good the 16 sounds. Pretty much magic.