Per you TV Fool report, WPXW is the ION affiliate on real channel 34 (VC 66.1) {also indicated by rabbitears.info
http://www.rabbitears.info/market.ph...n=WPXW#station } To receive WPXW-ION from the west, the antenna needs to ignore or reject the signal from WCAU which is NE of your location. The HD7694P does a very good job of receiving signals that it's pointed toward and receives very little from stations it's pointed away from.
Go with the best price you can find from a retailer you trust. I shop at Amazon, but not exclusively.
I did not mention before but I expect outdoor mounting to be a superior solution for you... based in part on your experience up to this point, which suggests there is significant attenuation or interference caused by the building construction.