I currently have a 55" Sony KDF-55E2000 LCD TV. It has 720p/1080i resolution but from my research and comparisons that doesn't tend to mean much anyway based on my viewing distance. I am looking at a panasonic plasma tv which has the same resolution but a 15000:1 contrast ratio and on all of the setups I have seen looks phenomenal (though in store where it has been tweaked to look that way.) Is it worth it to "upgrade" to a plasma for blu-ray movies and xbox 360 gaming or am I good to stay where I am at? (My tv looks good but plasmas that I have seen tend to be brighter and more vibrant, at least in the setups that I have seen in stores)