I get letters about this all the time.
They usually go something like this: "I'm no audiophile, but can you explain why all of the new, slim, pretty, thin HDTV's sound so bad? I bought a 46-inch Samsung LN46A850 for its great picture, but when I got it home, the sound was tinny. So I bought a sound bar but it had its own issues and I don't want to use multiple remotes. Any ideas?"
The problem is mostly caused by just how skinny these TVs are: There's no room for decent speakers. More than that, I'm sorry to say that sound quality isn't a priority for TV manufacturers, and they know that most buyers accept "good enough" sound. So there's no real demand from consumers to get better sound from TVs. And I guess the manufacturers assume anyone who really cares will spring for a better sound system.
My advice: Check out Zvox speakers; I've reviewed many over the years for CNET. The best bang for the buck model is the 315. It sounds great for $199, and since you can hook it up to the TV's audio outputs, you won't need to use a separate remote (that's also true for some other manufacturers' soundbars).
Consider the 315 only if your TV has a headphone jack--or if its audio output jacks can be set to "variable." Then you'll be able to control the 315's volume with your TV's remote (the 315 doesn't have its own remote).