For reception of both NYC and Philadelphia, there are two possible aproaches:
1. Use two Winegard HD7000R antennas ( a good subsitute Antennacraft AC9). Mount on a single mast with three feet between the antennas on your roof. Aim one antenna to 254 degrees and the other to 60 degrees magnetic. You must run seperate coax from both antennas and connect to an A/B switch to go from one location to the other. Radio Shack sells a remote A/B switch.
2. Use one HD7000R or eq. mounted on your roof in a rotor. I recommend the Eagel Aspen Roto 100. This rotor operates off of the signal coax eliminating the need for a rotor cable, available at
www.solidsignals.com.
A good all around mount for either system is a 3' tripod, also available ae Solid Signals.
I will look at the other location and post later.