I have seen all three of these for sale and all have different price ranges. Avia goes for about 35, cheapest I saw Sound and Vision was 12.99. I haven't seen the prices for Video Essentials. Which is better? Do they all work the same? What is the difference between the three? Any feedback would be appreciated. I just want to get my RPTV looking as good as it can! And my sound sounding like it should! Thanks in advance.