Thanks, I used that too on my thinkpad before but my TV would lock in "PC" mode even after I change inputs, must be something with the AV Receiver getting confused and being stuck at PC. When the TV is stuck in PC mode, a lot of the picture settings are disabled, and the picture turns into a soft mess. I have to unplug everything and replug them in order to get TV to allow me to select regular picture settings. This happens mainly on DisplayPort to HDMI adapter, but it has happened with VGA to HDMI too.I use VGA to HDMI adapter. They are like $15-20 and work good.
Looks like most of these PCs have PCI slots available a simple graphics card should help with performance and add HDMI.
What's your suggestion on i5 generations?