Funny you should ask, jojo. We just got new HD tv's. My Mom saw a column "Sound Advice" in last Monday's Sun and the question was about soundbars.
Budget: 2.1 channel Home Theater Soundbar from monoprice.com. $115.
Middle: Sony HT-CT150 Sound Bar System. $225.
Wow: 5.1-channel surroundbar speakers from Definitive Technology and Polk Audio. (no price given. I guess if you have to ask you can't afford it )

The columnist is Don Lindich at soundadviceblog.com

I went to monoprice.com to check out the $115 one & the reviews weren't all that great.
I guess I'm not much of an audiophile. I was expecting to have to purchase a soundbar after reading so many reviews about poor sound from LCD's but I have to say I'm pleasantly surprised to find that I see (hear) no problem with Mom's Samsung or my LG.