I tend to agree with Rick on this one: you are going to have to spend a considerable sum for an antenna system and get little or no potential benefit for it. If you are a *D* subscriber now, then consider Rick's option.
If you are NOT a *D* subscriber, you might consider another route: drive to Canada and pick up a Bell ExpressVu package. It's legitimacy is questionable in the US, but I know a LOT of Vermonters who have done so. It's cheaper than *D*, and it has the Boston digital stations, rather than the NYC stations, which may appeal to cranky old Yankees...LOL : Their TSN-HD Sports channel carries the Red Sox in HD! Bell really doesn't care who you are: give them a credit card for payment, and they are happy as clams at high tide.
http://www.bell.ca/shopping/PrsShpTv_Dth_Landing.page
Oh, BTW, theit porn channels are a LOT better than the US channels...LOL