Hsu or yamaha sub?


I've been looking for a reasonably priced sub to match with my Thiel CS.5's. I don't want to spend a lot of money, yet I don't want to sacrifice quality.
The VTF-2 and Yst-800 seem to be the two hot subs for $500 or less.
Has anyone matched these to a quality pair of speakers for a stereo setup? How did they sound? Any suggestions would be helpful.
I plan on connecting this sub to my preamp out on my Arcam Alpha9.
Thanks!
proud1
Hsu has lots of low bass energy for the $$$. Great for HT. Though I'd probably get something else for music.
No comparison. Yamaha comes out way on top. You get what you pay for with Active, variable bypass subs. And this one has a full function remote. Very subdued yet, you will see pictures on your wall crooked after watching a good war movie.
Hsu are good subs but the Yamaha YST-SW800/1500 are way more tight, controlled and musical. I updated from Hsu to an M&K and then finaly to the Yamaha YST-SW800, I own a pair of them.