If you've got a spare PC and 17-inch monitor, why not fashion your own NES bartop cabinet?
Step-by-step instructions are available over at Instructables, but the end product is a tabletop Nintendo emulator with both USB ports and authentic NES plugs. Plus, since it's PC-based as opposed to NES-based, the whole thing can function as a standard computer as well.
But what would you prefer—a sleekly integrated screen with a tiny emulator PC, or a chunky, nostalgic cabinet like this one? For some reason (probably that I'm old enough to have thrown more than one birthday party in an arcade), I'd take the chunky cabinet. Then I'd kick myself as I remembered that my apartment has no space for the thing. [Instructables via gearfuse]