Some TVs will have a Variable
Some TVs will have a Variable Audio output. You already have the TV, so you can check the settings in the TV and look for variable audio output. The headphone jack also has variable audio output if you have one.
My Sony has variable audio output.
Then for amplification I use this: http://www.amazon.com/AudioSource-AMP-100-2-Channel-Bridgeable-Amplifier/dp/B00026BQJ6/ref=sr_1_1?ie=UTF8&qid=1309723717&sr=8-1
And then I have Def Tech Mythos 2 speakers on the dresser http://www.definitivetech.com/Products/products.aspx?path=On-Wall/Shelf/Stand%20Speakers&productid=Mythos%20Two
And then I use a Sub in between the amp and the speakers for some low end. The amp turns itself off when there is no signal, and the TV controls the volume.
I spent a lot on this system so it will look nice, and honestly, I would have been happy enough with something like this: It’s a soundbar and wireless sub that will learn the remote commands for your TV volume. I’ve heard it in a store, and it’s not fantastic, but it’s MUCH better than TV speakers and for casual listening, it’s pretty good.
http://www.bostonacoustics.com/TVee-Model-20-P422.aspx
Also keep in mind, that the digital output of your TV will only output stereo sound from everything except the internal TV tuner. Anything connected to the HDMI ports will be in stereo from that digital output. Dumb yes, but that’s the deal.