Chances are you'll get a sharper image if you set the output of your UVerse receiver to 1080i (or native) and simply pass the signal through the 5200es without scaling. The Pioneer has pretty good 1080i video deinterlacing and scaling capabilities so you can make the most of the 1366x768 resolution (slightly greater than 720p) by feeding the TV a higher resolution source.
The HTPC should probably be set to 1360x768 and the Pioneer should be set to PC mode for this source. This gives you a one-to-one pixel map for your home theater PC. Again, you want to set the 5200es to pass the signal through without scaling. There might be better ways to deal with a HTPC for your uses; I'm no expert in this area.
Games for the xbox 360 are authored in all kinds of crazy resolutions so I don't exactly know what will give the best results. You might want to experiment a bit.
Chances are you'll get a sharper image if you set the output of your UVerse receiver to 1080i (or native) and simply pass the signal through the 5200es without scaling. The Pioneer has pretty good 1080i video deinterlacing and scaling capabilities so you can make the most of the 1366x768 resolution (slightly greater than 720p) by feeding the TV a higher resolution source.
The HTPC should probably be set to 1360x768 and the Pioneer should be set to PC mode for this source. This gives you a one-to-one pixel map for your home theater PC. Again, you want to set the 5200es to pass the signal through without scaling. There might be better ways to deal with a HTPC for your uses; I'm no expert in this area.
Games for the xbox 360 are authored in all kinds of crazy resolutions so I don't exactly know what will give the best results. You might want to experiment a bit.