Sound bars have come on in leaps and bounds over recent years with top models from Yamaha, Samsung and now Sony; however, they are no substitute for a discrete AV system with separate speakers and amp. (Which is always the way to go if at all possible)
In the end, only you can decide whether something is suitable for your requirement, so go along to a dealer and listen to a few to see if they suit.
Hope this helps with your decision.
Bil