More in the "low to mid gain catergory, but you could go with an Allen Sweet Spot with 6L6 Tubes. THe Middle control turns on the grind. Weighs in at under 30 lbs and puts out about 25 watts or so.
If you're more into the EL84 sound, a Sommatone Roaring 20 or 40 would fit that description. PHENOMENAL amp and can do mid gain very well. Weighs at about 35 lbs in a 1X12 configuration.