Ok I currently have a M&K 150 setup with a M&K 350 sub. I have moved and my theater room is over 4500 sq and want something bigger. Well I was really coming close to getting SVS PB12-Ultra/2 based on alot of the buzz here and other sites. Then I came across this thread which basicly stated that the M&K 5000 in a dual sub setup is pretty respectable. And I may be able to get a pair of 5000 for a good price. I love M&K but am tempted by SVS. The only problem I have is I have bought into the internet brands hype only to be let down before. If anyone had experience with either one of these I would really apperaite any thoughts.