Thx John.
Right now I'm getting half of the signal strength for many channels during a slightly rainy day with my existing outdoor antenna.
http://forum.tvfool.com/showthread.php?t=1267&page=2
I am inclined to get the Winegard 7694P instead of the HBU33 due to its slightly shorter boom length (just easier to install, perhaps less affected by strong wind) and slightly higher gain.
Though, I don't know if the benefit of slightly higher gain in 7694P would be offset by its relatively narrower half-power beamwidth. Or it won't be a negative impact enough in my case (most stations are concentrated around 319°-334°, a few @ 10°/11°, and a few @ the opposite direction 147°)?
Some folks also commented Winegard has better built than AntennaCraft.