I'll jump in momentarily, and then let others speak their opinion.
The difference in some of the LNxxx500 or LNxxx400 units is that they are - admittedly - entry level products, and separated from our mid and flagship models. So they may have 2 HDMI inputs where the mid and high units might have 3 or 4. This could weigh heavily on your decision if you're planning on having a lot of HDMI-connected peripherals. (Like Cable box, Blu-Ray player, game console, etc).
120Hz is good for fast motion. The benefit of 120Hz is that it is done internally, and projects the image on the screen faster than a 60Hz, so that when fast motion happens, the panel can "keep up" with the action. LCD is historically slower as a technology when compared to plasma or DLP or even CRT, so the 120Hz helps "even up the technology", so to speak, when it comes to fast motion. In short, it improves LCD's inherent weakness. Not to say that you can't get a great picture from a 60Hz, but the 120Hz panels are better for sports and fast movies.
Hope that helps, and if you need more, let me know.
Hey guys, I need a second HDTV for my bedroom and am looking in the 37"-40" department.
I found the 610 at Sam's Club for about $800, and it looks like a great TV. Well, according to costumer reviews, anyway (I'm shopping online and can't get to any stores soon to see for myself). I also found the 540 at Costco's site for $650. The only differences appear to be the contrast ratio (80,000:1 vs. 60,000:1) and that the 610 is 120Hz and the 540 is 60Hz. Are these differences worth the $150?
I'm coming from a Sony Grand WEGA KDF-42WE655 42-Inch rear-projection TV (720p, 60hz). I'm assuming BOTH of these TVs will blow by it, correct? I'll be using it mostly for watching TV, but also blu-rays and playing PS3.
Wait a sec, I now see thePN42B40 for like $550?! Are plasmas good enough? It's only 720p though.. Big difference?
Ideas? Suggestions for other TVs I've missed? Thanks!