In the process of building out a 3.1 System that I may eventually build out to 5.1 System. Anyway, equipment that I've ordered so far includes Onkyo 609 AMP and Martin Logan Motion 10 speakers for the Front. In addition, I've ordered the Chrysalis by Velodyne sub for $150 from Costco. I'd appreciate any opinions on this sub? Will this be a nice sub for a basic sound system? Never really heard of this Company, but since their primary focus is on building out subs assume the quality will be good for $150. Thanks for your help.