I think you are the only one that can answer that. Have you heard any of them in use?
Sound bars are a big compromise in sound quality over a real 5.1 speaker system. But as we all know sometimes a person has to make some compromises in order to get what they need in a room.
I just looked at a bunch of Sound Bars for the family room. I have a dedicated HT room and a real nice HT system in the bedroom but our minimum clean look modern family room would not look great with a bunch of speakers around.
I bought the Sonus Playbar and there sub. Sounds good for the money and most of all simple to use and always work with the tv with out a separate remote.
Zvox has been running their's on sale recently. I have the 580 in a bedroom and it does a really nice job. It is an all-on-one box rather than a sound bar per se, so it is rather large in comparison. But, it has two 6.5" woofers that do a decent job and the mids and highs are nice sounding as well. Plenty of volume, too.
Having had soundbars for at least 5 years and watching their growth and development, I can say with some experience that you buy the best your money can afford. For my money, I recommend the b&w panorama 2 with the accompanying sub. You won't regret the purchase.