If you're into DIY, you can build an exceptional directional UHF antenna, tuned to the 14-51 channel range of the post-transition era for about $20 in parts from Menards/HomeDepot/Lowes.
The DIY antenna offers, on average, 5 db greater strength (in other words, 4x the signal gathering level) of commercially availalble UHF-only antennas.
Here's a link with more info: http://www.digitalhome.ca/forum/showthread.php?t=96483
They're called "Gray-Hoverman" antennas, and that Canadian forum contains avid antenna geeks modelling every variation of the antenna with software to come up with the best possible signal level across all UHF frequencies.
The copper for the active elements cost about $10, and the PVC for the frame costs about $5, and then some screws and washers and coat hangers (for reflector array) will bring you to about $20.
I've built the older version of this (with about 2.5db less strength, or 1/2 the maximum level that this new one can do) and it definitely blows away the ~$40 UHF/VHF combo antenna that you find at Menards/Fleet Farm, for the UHF band. Even inside the house through a wall, it gets a ~95% signal lock on locals in Fargo vs. about 65-85% for a simple bowtie antenna. (Though it's not the nicest looking thing to have next to your TV of course