Im in the stage of upgrading my equipment from having a half to a full stack and would like to try out my swr workingman 4x10 and spector rebop with the avatar 2x12. As a head im looking at the Qsc rmx850 or the Behr****r ep1500. The SWR 4x10 is 400watts. I would love to test out the different 212's but its difficult since they are factory direct.The delta is aproximately 40 dollars cheaper and has 1,000 watts (which is more than needed i think) but is ten pounds heavier.The neo is 600 watts and supposedly supports the mids better while being ten pounds lighter. The price difference isnt much so I am willing to spend a bit more if the neo is better. I figure I have a while before I start getting back problems, besides, either way its lighter than the swr. Ohh, and my band plays mostly jazz and rock, i heard we sound like grateful dead like 2 times so ill go with that. We gig 2-4 times a month. Lastly, ( i am as dumb as people come about things) if the spector has the active pre in it would i still need to go out and purchase a pre amp. I realize if i were to play any passive bass i deffinately would. Thanks a lot, any help appreciated.