I agree that preferably you find a TV with 3 HDMI inputs for the most flexibility. You'll hopefully upgrade your set less frequently than your other components so having the extra one might come in handy down the road. So you shouldn't only consider the components that you have right now. I also don't like having extra little switch boxes connected to everything because it means you also need extra cables all over the place.
That being said, a lot of sets will have at least one input on the side the set for easy access from the front. Mine is like that with 2 HDMI in the back, and one on the side. The only problem with using the one on the side is it's OK for temporary use, but as a permanent connection is that it doesn't look very nice having a wire sticking out like that. So that extra HDMI connection on the side is not as useful as the ones in the back.
Remember, too, if you ever get a new A/V receiver in the future, it will probably have HDMI inputs as well so that can work as your switcher, too, and you'll have plenty of HDMI inputs to use.