Thought of upgrading the receiver? You could go HDMI for all the connections. Even the lower end receivers now have HDMI. Denon's from the 1508 up have 2 HDMI inputs and they are relatively cheap. Then you would just need to buy an adpater From HDMI to DVI for your TV. Audio and video switching is then taken care of buy the receiver.

Do they even make HDMI splitters?

Jason
M80 v2
VP160 v3
QS8 v2
PB13 Ultra
Denon 3808
Samsung 85" Q70