Im looking for a back-up amp (new or used) somewhere in the $300-$500 price range. Here are some guidelines what Im looking for: Min. 300 Watts at 4 Ohm Preferrable min. Ohm 2 NO graphic EQ Equalizer freq.: Bass at 50 Hz Semi parametric mids Treble at 7 kHz or higher (boost would be OK) D.I. (w/ ground lift) out Optional compressor Optional tuner out Reliable Amps I play(ed) and I like(d): Ampeg SVT III (the old one, NOT the pro) Fender Bassman 400h Warwick pro fet III Amps I used to play and didnt like: GK (several, didnt like any) Ampeg SVT III pro Peavey Mark III (I believe). What amps should I look into?