I have the LG it does 1080p 1:1 on the hdmi input. It does not have dvi but it comes with DVI->HDMI cable. I'm not sure about the vga input has 1:1 on it. It also has a component input not sure if it accepts 1080p.
I have my 360 hooked up through hdmi and it has 1:1 idk about vga if you want me to post some pics of it i could but i only have a webcam so its not going to look really good.