Another vote for the Blues Jr. I have a Blackheart little Giant, and it's a nice little head and sounds great when driving a 4x12 marshall cab at lower volumes, but as soon as you start getting up to 8 or 9 there's no clean anymore, not even if you roll the volume off at the guitar, but now I'm driving my 4x12 cab with the Blues Jr and it's drop-dead amazing. I've played the Blues Jr. on a kickback stand for years and never even had a problem keeping up with a 6 piece funk band with horns. The Blues Jr. has a footswitchable clean/boost channel, 15 watts of tube power, spring reverb tank, and the ability to drive any external 8-ohm cabinet you'd like. For 350 bucks used on craigslist/ebay all day long, it's pretty hard to find a comparable bargain.
Full disclosure - I've obviously drank the kool-aid here as I use this rig, but I have used a lot of others and this is some solid intel - I ALWAYS come back to the Blues Jr. I wish they made it as an amp head - that would be amazing, and I would buy one today.