I am looking for the right head to push my Ampeg SVT410HE (8 Ohms) and will probably be buying either an Avatar B115 or B212 Delta LF soon (www.avatarspreakers.com). The B212 comes in 2, 4, or an 8 ohm option. What is the least amount of watts I should look for in a head, and do you think I should add the one 15 or two 12's? Right now I use a Peavey Combo 210TX and that is it. I will probably sell it when I obtain the new head. I need more volume and punch. Note that I would consider cabs other than the Avatar's, but have heard that they are very good for the price, and I am looking to spend somewhere in the range of $300 for the cabs. Remember, I am new to this so any insight you have will be sincerely appreciated.