When I trying to decide which way to go, I called Sumiko, the US distributor for REL. They stated without a doubt, that one Stadium III was better than two Storm or Strata III's. I purchased a Stadium III and couldn't be happier. I'd go with a sub that has flexible cross over points. REL's go down to 22hz. I never thought I'd have my sub set as low as 23hz, but that's were it ended up. Like a previous post stated, a lot does depend on your main speakers.
