Difficult balancing act but the answer may be more obvious than it seems.
In the past, have you ever made a purchase where you compromised and then almost immediately wished you had gone for the model you really wanted? If so, get the F8500. If not, go with the F5300.....provided you can pay cash for either one of them without putting yourself into a bind.
If you have to finance either one of them or paying cash would put you into a bind....then the solution is to not buy either one of them.
Samsung 64F8500, Panasonic 65VT50, Oppo 95, Tivo Roamio for OTA, Dish VIP722, Marantz AV8801 preamp, Rotel Amps, Atlantic Tech 8200 speakers, Seaton Submersive HP, Calman 5, Chromapure, Accupel DVG-5000, VideoForge HDMI II, i1Display3pro, i1pro2, eecolor colorbox.