Switch from Android? Heck yes! Even my wife is ready to toss her Galaxy S3.
Buy 920 now, or wait? I just came from Sprint, and after waiting for an eternity for a new WP8 device, I jumped ship after they sent out another press release to announce the new handsets arriving just around the corner. Had to leave, the network has been even crappier the last 6 months. Anyhow, I thought about waiting for the EOS, but at the end of the day I decided to just get the 920. Love it. Although the EOS will have a much nicer photography set up, I don't think I will like the bulge in the backplate.
Whatever floats your boat, but I will say that getting the 920 now will hardly be regrettable.