Take a look at these examples of how to use the data in your TV Fool report:
http://forum.tvfool.com/showthread.php?t=109
The equipment you've spec'd is at the top of the list of high-gain, low noise & low loss respectively.
Bear in mind that in addition to signal strength (measured as total power delivered to the tuner), you need to take into account interference from stations on the same frequency and adjacent channels.
As an example... When I run the numbers for WCTX, real CH-39 (with some assumptions) I get a net NM of 15.2 dB (a descent fade margin). But you also need to consider the interference from WSBK on the same channel and WGGB on real CH-40. WSBK is about 16 dB lower in level and roughly in the opposite direction. The relatively high front to back ratio of the 91XG should keep enough of the WSBK signal out to allow reception of the WCTX signal. The stronger signal from WGGB is well off to the side, so you are still in fair shape. You won't know for sure until you point the antenna for real. (attached screen shot)
The bottom line is, you've got some of the best directional antennas on your list. These are going to give you the ability to maximize reception of the station you're aiming at while receiving less of the signals to side or rear. To beat this would require custom built antenna arrays.
It's time to hang some metal in the air.
