What? Cant hear the voices

I think this may work pretty good for you. Check it out

http://audioadvisor.com/store/productdetail.asp?sku=YAMAYSP800B&product_name=YSP-800%20Digital%20Sound%20Projector

Audio compression will help minimize the problem, but is this a solution or a band aid?

If you can't hear voice then something is wrong with your speaker quality or you are not properly using the phantom function to send center channel info to your main speakers (as you have no dedicated center channel).

Built in speakers in most TV's are NOTORIOUSLY bad....they are usualy boomy in the bass and suffer from mid range compression (all in order to sell in the two minute demo sales floor test - loud sells - so engineers design a TV that requires you to significantly jack up the volume to hear the voice and that way they sell more TV's than a competitor with an accurate sounding TV that is all too clear at lower levels! BTW this same technique is also used to sell speakers.....jack up the bass and the treble and kill the mids....actually easy to do even a speaker with "flat response" may have these features built in...all they do is narrow the mid range dispersion and use a low cost design that compresses the mid range at higher volumes...in the shop demo you tend to turn up these speakers louder than you would a more balanced design)

I looked at the pictures of your system and room. I wonder about the effects of all that glass behind the speakers. Might a curtain reduce some of the problematic reflections that the window likely introduces?

Audphile1: Thanks for the suggestion. I looked up the reference and it seems to be an elegant solution for someone such as me who is not needing the ultimate in surround. Do you have one of the Yamaha units and do you like it?

Gammajo, no I don't have this unit. I remember seing a picture of it in Audio Advisor and thought that this would work well for you so I looked it up on their website. It's not really cheap, but looks to be just right for what you're trying to do. Plus it has several digital inputs so you can basically have your dvd player and your cable box hooked up to it. And no receiver required!
AA offers 30 days money back so if it does not work out for you, all lost is shipping cost.
I wish I can offer an opinion in regards to how this thing sounds, but I never listened to it.
I think it has to sound way better than your TV speakers though.
Best of luck.