The Rel subs are nice well built subs, but not as good for music as the Vandersteen 2Wq. Because the Rel is like every other sub in the world - other than the Vandersteen - the way it gets hooked into your system is half the problem. The Rel and all others give you a line level connection that comes from your preamp. This means that the sub will only be augmenting the bass below where your speakers stop working. This doesn't help free your main speakers from any burden of making deep bass, nor does it relieve your power amp from any burden in the bass. The Vandersteen system will roll off your mains before the power amp making both perform much better than they do full range. Vandersteen does this with an unobtrusive 1st order crossover that consists of nothing more than a capacitor. Also, the Vandersteen sub gets its signal from you power amp and will take on the sound character of your amp which allows the sub to blend much more seemlessly than any other sub. Sorry Rel.