I only heard the Hsu speakers briefly at RMAF and they sounded a bit harsh to me.
I agree if you go Ascend get three of the 340s across the front.
Your room is not too big, so you could probably save money and get the Rythmik sub or an SVS PB-1000 over the VTF3. That really depends on how loud you like it, how much bass you want, considerations like neighbors, wife hating bass, sleeping kids etc. for example, I have an older PB-10 sub from SVS. It is not quite enough for my room, but since it is a family room not a dedicated HT room, my wife always asks for the bass to be a bit lower. So a more expensive sub would have been a waste, except for those rare occasions when I am home alone and I wish I had dual PB-13 Ultras or Seaton Submersives!