[GS3]

I live in Salinas, Ca. I have Directv with an HD DVR. Directv does not offer the local channels (Fox, NBC, CBS, ABC) in HD. The local cable company, Comcast, and DishNetwork both do have the local channels in HD. I contacted Directv and looks like they will not have the local channels in HD for a long time to come.
Seems it will cost Directv a lot of money to convert these to HD. So with two HD televisions, we can't watch the 4 local channels in HD, only in standard format.
So I either switch to DishNetwork or find some device that will allow us to be able to watch all of the local channels in HD (when you watch an NBA game in HD on TNT and then watch a game on sunday on NBC in standard format, it is a huge difference).
I did the TV Fool Signal Analysis and it said we can get 3 of those 4 stations with just an indoor antenna.
I was reading about the Terk Technology HDTVi UHF/VHF HDTV Indoor Antenna as a possible solution. Does anyone have any suggestions on an indoor antenna so we can get HD on our local channels?