Subwoofer to match my B&W 601s2,CC6s2 and DM600i

Does anyone have a suggestion or advice ?
Thanks

I'd go with a sub from Outlaw Audio.

Flatsmaster, you may have already made your purchase. I haven't been on Audiogon for a while. Since your loudspeakers are B&W, then keep it simple and don't get overwhelmed with the plethora of subwoofers on the market. Stick with B&W. That's what I have done and they work very well together. I actualy have two in my system for improved and more balanced room loading. Your room is large and going with two subs placed apart from each orther would be the way to go. The only catch is that you're spend more than $500.00 for both new and possibly even preowned. But in the long term, it'll be well worth it.

I can't say enough about the SVS non-ported 1000. Great return policy, warranty, and craftsmanship. I bought two primarily for 2-channel music, but even at 1/5 volume they give me all the depth I need. $949 for the pair and free shipping on a 45 day return.