I love my 990, but I really really really wish it had:

Dual component video outputs. I run the component output to a projector, and I have a regular TV for when I don't need or want the projector on, like when just watching regular TV or having TV on in the backgroud. I have to run s-video from my Tivo straight to the TV, and my Xbox requires the projector because it's component output only. I'd like to run component to two different displays.

Display dimmer. Self explainatory.

Other than that, there's nothing I miss!