I'm trying to decide among these 3 choices: Sony KDL-40XBR2, Samsung LNS4096D, and Toshiba 42LZ196. I can't really find any info on the Toshiba, and don't know how to decide which of these tvs to buy. All have 1080p resolution and claim to have deep black levels, accurate colors, and fast response times. Is there any objective way to measure the performance of these tvs? I went to an electronics store, but I can't tell anything because they put different signals in all of them. I'm going to connect a ps3, blu-ray player, high def satellite, and my pc for watching tv and gaming. I also wanted to mention that I read the samsung automatically upconverts video to 1080p, but I don't know if the other sets can do that. Since I'll be using it primarily for games, action movies, and tennis its important that I have something that has a good refresh rate.