Monocular or biocular. 800x600 isn't too hard to find in biocular displays, but its pretty rare with monoculars.

In any case tekgear.ca has a good list of wearable displays, among other things, and they're one of the few places I've found where you can buy high end displays, aside from manufacturers and the rare eBay auction.

Another input device to consider is the Twiddler2. It's been the favorite input device in the wearable community for a long time. Its not much more than the frogpads and there the original model can be converted to bluetooth.

Out of curiosity, what do you plan to use the wearable for once you have it built