Well as luck would have it I just acquired an Ampeg SVT4-pro. Now the question is what speakers should I hook up to it? I already own a GK 2x10 combo (400rbIII) and like the idea of incorporating that into my stage rig so I could use the 400rb as a backup. I also like the idea of using the bi-amp feature of the amp which would naturally point me towards adding a 15. In that case should I just get the GK 115 200w cab that matches my 200 w 10's? At 8 ohms I would be putting 300 watts into each cabinet. Is that OK? If I got a 4x10 4 ohm cabinet would I still want to use the bi-amp and x-over? I am just kind of new to having this many options so any pointers or thoughts at all would be helpful. BTW, I mostly play the music of PHiSH (tribute band) so think Mike Gordon . For those not familiar with Phish or Mike I am basically going for a modern full range fusion sound with a 5 string and active pups. Size of venues is anywhere from 100-1000. Also, I have heard a few bad things about the quality of this particular amp. The one I got was just repaired and is supposed to be good to go now. It crapped out on the previous owner and while it was being fixed he ended up buying something else. So I got his old amp...lol. I figure with the backup GK amp and a well ventilated rack I should be OK. Any thoughts? Does this sound reasonable?