Okay, so I'm interested in a GK 700RB for sale here locally. Doesn't seem to be much info here as opposed to other GK amps. I'm assuming it's 700W. How does it differ from the 700RB II. The amp is not connected to a cab so I won't be able to play it before buying. I know GK makes great amps, how does this one rate? Oh and by the way the asking price is $350.