RatShack VU-75 that cost just $16... but with an inline +10dB amp and rotator.
http://www.hdtvprimer.com/ANTENNAS/VU-75XR.html
Once the stations increased their power after February, I no longer have trouble picking up stations up to about 40mi away, and I'm in a valley, too.
Mark as far as I know, WHDH is the one that has been having VHF DTV problems and wants to stay on their temporary UHF channel, but AFAIK WCVB is staying put on UHF.
Tom