All in all I got my blues Jr for $285 with shipping on ebay and love it. Your tone is made up of several factors; Your guitar, effects, amp, cables, your hands (lol). I wouldnt go nuts on an amp, I am more into pedals and tweaking than huge power amps. I have awesome tone and my guitar can play at any level and sound good. It doesnt need to be cranked up.
Good luck,
P.S tube is the only way to go, once you get one you'll never go back.