I already checked out the website you listed. I am about 15 miles outside of Minneapolis, where every channel broadcasts from. The site recommends a large outdoor antenna. There are certain people above me in the food chain who have already nixed the outdoor antenna option.
I agree with everyone who said that cable is the way to go. I currently am receiving HD cable, great stuff. You can't use a PVR for HD cable though, only the analog channels (like normal espn, tbs, history channel, etc.), so the only way to record HD, using a tuner card in a computer, is to record the OTA HD channels. Pain in the butt, why can't everyone just agree on certain standards in this industry!