Have you tried plain old rabbit ears? Our signals are very good since the majority of the stations are now located on the super antennas on Lookout Mt. At our house I'm getting -20dBm to -30dBm signal strength with just rabbit ears.
I will be putting an antenna on the roof, though, to get it out of sight. But I've found I will only need a dipole (I'm doing a folded dipole to make it even smaller) and not a yagi. MUCH easier to get out of sight.
With the stations collected pretty closely you could point a yagi at Lookout inside your attic or garage and still get good strength.
"Why does the U.S. care which flag will be hoisted on a small piece of land thousands of miles away?" -- Ron Paul