Problems With LCD TV

Basically in the market for an LCD flat panel. Never had one, so I figured now's a good time since they are pretty affordable. I have found two RCA's, with the same features, except for the Hz, which I believe is refresh rate. The one with 60Hz is 500, the 120Hz one is 600 bucks. I have no problem spending an extra hundred dollars for quality, but I am also looking to buy a 5.1 ...

I am sending the TV in and it was just opened out of the box about 14 days ago and noticed the Clouding or UNEVEN BACK LIGHTING in this thing… I was wondering… Can the Technician FIX this problem or will they send me a new TV of the same Model? It's a Emerson LC401EM2F if you'd like to look at the TV. Has a great Picture just a bit frustrated with this issue.

I just got this brand new LCD TV yesterday, I have my PS3 hooked up to with a HDMI cable and whenever anything moves on the screen, there's a blur that follows it. Why is this? I tried messing with the TV's Picture settings but couldn't fix the problem. Do new LCD's just do this for awhile? Should I take it back? is it the PS3? Help please!

I recently tried to run RCA cables from the 3.5mm speaker jack on my PC with a 3.5mm to RCA converter cable(6") to my HDTV however when I hook it up through the "HDMI port 1" audio inputs I don't receive any sound on the television, what can I do to fix this problem? The television is an Emerson LC401EM2f 40" LCD HDTV