Since I own the PB 13 Ultra I would recommend it. I have heard the ULS 15, but I am sure you would be very happy with either one. The Hsu I have heard was very good for movies, but did not do as well for music, too punchy IMO but it was the lower model STF 3.

Jason
M80 v2
VP160 v3
QS8 v2
PB13 Ultra
Denon 3808
Samsung 85" Q70