Thanks alot for the info.I recommend the Winegard 7015 antenna as the best bang for the buck. If you need something a bit more inconspicuous, the Winegard Ghost Killer should work well also.
While this is true in many areas, Philadelphia does have a low band digital VHF-6. (WPVI-ABC) Both of the antennas recommended for the OP are designed for channels 2-51.No need for low band vhf anymore.