I'm looking to get a good subwoofer cab (1x15", 1x18"... hell, maybe even a 2x15" if I feel like going overboard.) I currently play through a Mesa Boogie 4x10 from the mid/late 90s, with a Warwick Profet IV as my head. As you could figure, I just need to find a good subwoofer cabinet to fill up that low end that my 4x10s muddify. My Price range is from $250-$400. I would love to get a Mesa 1x15" but I don't have the kidney to spare to buy one of those... Any thoughts?