check out a carvin VINTAGE16(www.carvin.com).Its 350$,but the extra fifty will get you the best real tube sound in that price area.
heres the description from carvin.
"Carvin's Vintage 16 is the amp everyone has been asking for. This "all tube" amp features 16 watts from two EL84's and is switchable from its normal Pentode to "Triode" operation delivering 5 watts. There is nothing sweeter for recording! Great soak and tone is delivered from 3 12AX7 tubes. The Vintage 16 features Volume, Soak, bass, mid, treble and reverb (Accutronics tank). The efficient 100w GT12 speaker delivers a big sound from a small enclosure while delivering a clean classic guitar sound with perfect balance and clarity."
that would be my choice...
Try once,fail twice...