I agree that "dave@ultrahifi.com" comments should be ignored. I went to Ultrafi.com and what do you know, he is a Vandersteen dealer. Just a sales pitch disguised as advice. Even the information of his product the Vandersteen is misleading. The Vandersteen runs with a crossover between the preamp and amp along with the amp. He claims it runs off the amplifier. The REL is the one that runs directly off the amplifier outputs, which is why it integrates well. I will say the Vandersteen is a nice sub for $1200. It is a different animal. It replaces the bass produced by your main speakers (the crossover). The REL compliments and completes your main speakers running full range.