Currently have a sorta crappy 42" Apex. The HDMI ports no longer play audio, so it needs to go. Where is the best place online to buy a TV? I bought this one without doing much research, so I want to do a better job this time. Also, would it be better to buy now, with Christmas sales? Or after Christmas to hope for better sales? For reference, I could go up to 50" or so, and I would like to stay under $800. Any help would be appreciated. Thanks.