Hi Glenn, you can find more information on the features of AF5 here http://www.aerofly.com/features_en.html and on AFPD here http://www.aerofly.com/afpd/features.html As far as flight physics for airplanes and gliders, photorealistic sceneries, and ability to modify aircraft settings are concerned, AFPD is still a great choice. Your computer specs should be good enough for both AFPD and AF5. In either case, I would recommend the usb interface version where you can use your own computerized radio with its programmable functions.