imo HSU offers the best value... The vtf2 or 3 would be on my short list for subs under $1000... I demo'ed the 2 and 3 and kept the vtf2 because to me it sounded better in my room, I liked the bottom mounted sub vs the side mounted, and the 2 has more than enough output for my room, I ended up buying another one shortly after and LOVE the pair, not for output but for how invisible they become when you double them up, it smooths the room response and melts them into the mains much better...
So my vote is for a vtf2 or 3, demo them both and send back what you don't want, or start with the 2 and if its not enough get a 3 or another 2... I have bought the svs, rythmic and a few others, I can say with out a doubt the hsu is the best bang for the buck in my book... We are all brand biased by what we own, but I own all 3 and prefer the HSU, and if I didnt like something and its price it would go back {not in the case of the Rythmic because I put it at my mothers house and I don't think it has been turned on in 6 months, lol..