I've got a device attached to the 980H in my
two-channel system in the living room. It is a Sonic Impact V55 iPod dock - they had to cut the price on it pretty drastically last year because Apple released a new generation of iPods that weren't compatible with it. I picked it up early last summer for about $35, and use its video line input to give me a view of the 980H's composite video output. I think they've updated it to fix the support issue, so the price has gone back up. Here are a link:
Sonic Impact Video55 Memorex also makes a similar dock, but it lacks a video input so wouldn't work for your purposes. Likewise, all the LCD photo displays I've seen lack a video input.