I bought a Fender Blues Jr. a few weeks back and I LOVE it! It's just 15 all-tube watts. when overdriven, it doesn't get harder than a bluesy kind of distortion but, I added a Boss Metal Zone to it and it made all the difference. I love this little combo and it's going to be great when I get to recording with it. My suggestion is to go to a music store and just fiddle around with them till you find one you like in your budget. I'd spring for a low end tube amp before buying a solid state amp of equal value. Whatever works for you.
TUBE ALL THE WAY!!!!!
Chris