Carl: Trying to match the rosenut wood finish to the finish of your MLs via a photograph on a computer screen is not a good idea. These types of finishes vary, and while I was at the Hsu Research facility, the rosenut finish had a plumb hue. I'll also mention that it is good that you have more than one spot that you may place the sub. The more locations the better chance you have in being happy. But the subwoofer itself will dictate where it should be placed (via the subwoofer crawl test). Because of the very low frequencies that a subwoofer puts out, the wavelengths of the lowest frequencies can easily exceed 60 feet. That can and does play havoc in most rooms, leading to peaks in some areas and nulls in others.
Subwoofers push air. Sound waves can cause doors to move, items to rattle and your floor, chair and your body to vibrate. Pressurization can occur in smaller sealed rooms, but I doubt you'll feel any in your large area. Pressurization can give you the feeling that you need to yawn to pop your ears. In extreme cases one may feel a bit nauseated.
Don't worry about overkill in your large area. Matter-of-fact, you may actually need two subs to justify that volume and to smooth out the frequency response (getting rid of peaks and nulls) at the listening position(s).
I also agree with tvuong, in that the VTF15H is what you will need in that large area, and probably two. You will no doubt find that out once you order the first sub and test it out. It's possible one will be sufficient, but it depends upon your expectations and how loud you listen to movies.
Oh yeah, one other thing I'll add. A subwoofer can vibrate a lot of walls and floors. I have had to silence vibrations in many rooms of my house, but you'll never get them all. Can it bother your wife upstairs? You bet. Sound waves have no problem going through walls and even outside where neighbors may be effected. Welcome to the wacky world of powerful subwoofers!
Last edited by dsrussell; 06-25-2014 at 03:33 AM.