The time has finally come (almost) where I can get a proper sub(s)!!! Now that I am so close, I am getting overwhelmed with options though. I am going to say right off the bat that I want SVS all the way. I know there are tons of other great options, but I want to stick to only SVS. Part of that is because I have lusted after an SVS Sub for so long its not even funny. The other reason is because it automatically cuts down the the insane amount of options and configurations that are out there. I don't think I am short changing myself sticking with only SVS either.
With that out of the way, lets talk room. I will have more exact measurements later today or tomorrow, but its large. The living room and dining room are open completely to each other and form an L shape. Both areas have a vaulted ceiling that is ~20' high. The living room area is probably 25' x 20', and the dining area is 11' (I measured that) x 20'. The kitchen is what creates the L shape in the area, and is open as well, but with a half wall on each side. The kitchen has a 9' ceiling, and is probably 14' x 20'. Above the kitchen is a loft area, so the stairway, upstairs hallway, and loft are all open to this space. Downstairs the front entry way is also open to the space. Like I said I will have actual measurements, and pictures later today, but hopefully that gives you a general idea of the space.
There is two sides to this large space. One is since it is large I want a massive sub to fill it, BUT this is a townhouse and I have adjacent neighbors so I cant crank it to ear bleeding levels. Two I have adjacent neighbors now, but one day I will not and then I will be able to crank it to ear bleeding levels

So I don't want to go so small that it doesn't fill the room, and I don't want to go so large that I wouldn't be able to use it at all. To me this sounds like a prime candidate for a two sub set up, but I am open to more or less.
The budget is $2,000 for now. I could push it if its justified, but I have lots of hobbies that cost a lot more than this one

So that puts me in a PB13-ULTRA or down if go with a single sub. If I went with two subs I could do PB12-NSD or down. I can say that I really REALLY want an ULTRA, and have forever. I think the wife (and the wallet) would say that TWO of them may be a bit much. If I go with two subs then I really like the smaller sealed options. The SB12-NSD seems like it wont quite compare to the single ULTRA though. The biggest thing is it doesn't play as low, but how much does that matter? I realize that the PB12-NSD plays much lower, and the ported box will be better for the large area but its size makes it harder to justify two of them. Dual SB-13 ULTRA's would probably be the best of everything, but its over budget a fair amount. I could always get one now, and one later, but I think if I tried something like that the wife wouldn't go for it. I see the argument of "well we have only had one for this long, and isn't it good enough?". So that means I need to do it all in one shot
So now you see my conundrum, and that is a hard enough choice sticking with only one brand! So to me (right now) its between these options
Single PB13-ULTRA
Two SB12-NSD
What is everyone's opinions of those options, and what other configurations should I be looking at? Sorry for the long post, but I have been flipping this around in my head for months! Thanks in advance for the help!
Sean