I currently have a 2x12 Hartke combo w/ 120 watts (b-120). I'm thinking of upgrading to a 350 watt head which would be the Hartke 3500, and an Avatar 2x10 with 350 watts EACH speaker. I'm a bit confused and ran this by with folks on Harmony Central's Bass Forum and they said it was cool. But wouldn't this be underpowering? Dave Avatar's ad on this cab said 350 each equaling 700 RMS. Does it matter? I've just been stuck with Combos up til now so I'm kinda new to this ****. What type of room would the avatar and hartke head fill? Suggestions on gear are welcome, but I've pretty much decided on what I can afford and what I need.