I currently use an Ampeg SVT3-PRO/SVT610HLF(4 ohm). I am considering selling the 3PRO to purchase an SVP-PRO preamp, (I love the sound of the tube preamp) and going with some form of poweramp in the 1200 watt range. I am considering this so that I will have room to grow with an additional cab in the near future. I cannot add to this rig because my hands are tied with the 4 ohm limitation. Would anyone like to help push me over the edge with the decision? How about power amp suggestions?