Which sub would you choose?

I think foreverhifi offers some very good advice. I have listened to the Watchdog, and it is an excellent subwoofer, but how much better is it at $10k vs a very good $3k sub. You could spend less and buy 2 sub woofers. Two are much easier to place and get a flat response. The other aspect is the Revel uses a parametric EQ, similar to our PARC design. This can really help bass mode problems with subs, and large speakers and allows proper speaker room integration very easily. Using subs now is now very common as their designs have gone from being the HT booming thing to something that really adds that last octave in a musical way. But it's integration with the rest of the system and the room is what is key to achieving that musical quality as well as the HT boom--even in HT it should come across as natural and not just a motor box in the corner. There are two things I would direct you to that might be helpful. Both on our website, www.rivesaudio.com Go to the listening room. In the speaker section there is a download for speaker placement, and it goes into subwoofer placement and 2 vs 1 subwoofer. The other area is to click on the modes, and this describes the bass modes that can be caused by any low frequency interaction with the room. As stated, we design a PARC that compensates for this problem, but Revel has wisely incorporated this same type of technology in their B-15 subwoofer. I don't think it's as sophisticated as what we have done, but it is cost effective and very useful for sub integration. (Yes, our PARC can be used for other subwoofers as well).

How about the Aerial? Best sub I've ever heard. $10K for a $700 woofer in a big box? No way.

I have a wilson sub in my listening room right now sitting next to a velodyne 18, I will tell you that I think the velodyne is better regardless of price, and I will be taking the wilson back to the store. I have to say also that I am a wilson puppy 6 owner and love them set up with atma-sphere mp1 pre and ma2 amp. I have not heard a system that I like better. I am also very sure there is a better system in many a home.

So now, just for curriosity's sake "Rivercitylad", I would like to know if you STILL plan on buying a Watchdog woofer? Also, has any of what has been said above caused you to possibly rethink your choices?...currious.
Really, a good woofer(or more..even better) properly set up, with good seating location, and with possible parametric EQ'ing, and you would be shocked at what's possible! Even modestly good subwoofers, properly set up and calibrated will do some very good things sonically.
Have fun...

Thanks for the insight in sub selection. I think I will rule out getting a single sub and focus on which pair to buy. I think my choice will be between the REL Stenor , the Aerial SW12 and the Audio Physic Mimos. Anybody have and feedback on these three? Thanks, Rivercitylad