Not trying to be a lemon here, but if music is important to you (the quality) and the quality of sound of the soundbar, trust me, go for the b/w panorama.
I bought it after I had the ysp 2200 for a couple of weeks. the difference is heaven and earth.
b/w sounds hi-def and it does work great as surround in the same proper setting as ysp 5100. I've heard both, there's no comparison IMHO.
The bowers and wilkins sounds like a full home theatre, everything precise, everything perfect. You don't need a sub, any tweak at all, it's just wonderful.
Pop in a Harry Potter movie in a quidditch game, crank the volume up, and be amazed. It trumps my previous 5.1 systems and puts the YSP to shame.
And as for HD formats. I heard my YSP 2200 with DTS HD, DTS hi-res, Dolby True, Dolby PCM.... and nothing compares to the subtleties of the bowers and wilkins performance with the simpler DTS and Dolby Digital 5.1.
I listened to Black Swan, Batman Begins, Moulin Rouge and Dracula in Hi-res formats... and I thought it sounded great.
I listened to the same in their normal DTS and Dolby 5.1 in B&W and it sounds AMAZING. If B&W decoded HD formats imagine how it would sound...