I've had good luck with HSU
I own both the VTF-2 and VTF-3 and feel you could well with either model depending on how big you want run with your sub. I've a similar sized living room and go with the larger VTF-3 there and use a VTF-2 with my bedroom system. Check the reviews here and elsewhere and you can feel confident about them. Also, the folks at HSU are top-notch. They treat me like family and email me from time to time about how I like their products.
This is unsolicited praise from me. I don't work for them, just love their products.
Da Worfster :cool: