I would vote for both. Wired, as others have said, is future-proof (as long as you run gigabit) and more secure. It's also much less of a hassle than spending hundreds on new equipment when a new wireless standard comes around and is easier for streaming HD to multiple TVs/base station in your house.
Also, go wireless for the portability factor for laptops, PDAs, cell phones, etc. that can benefit from this.
Also, go wireless for the portability factor for laptops, PDAs, cell phones, etc. that can benefit from this.