what's the difference if you have to plug an analog piece of equipment directly into the back of the TV versus into a small breakout adapter attached to the tv? The source will be displayed either way. You said you had a TV stand, so i would assume that you aren't mounting it, so what what would a tiny dangling adapter hinder you from doing? You're free to do what you want, but IMO that's a pretty silly reason for not choosing the set with the superior PQ. When buying a premium display, the picture quality should matter the most. While the HX850 is no slouch, the HX929 is clearly better.
As far as reviews, television info is a joke. They are not serious reviewers and they do not know how to properly calibrate a tv. The settings they use are worse than those used in any Best Buy showroom. If you back and re-read their hx929 review, you'll see they purposely reviewed it with local dimming turned OFF.
ht Panasonic TC-P60ZT60, Monitor Audio: Silver RX6, RX Centre, Radius 90HD; Martinlogan Dynamo 700, Marantz SR5006, PS3, Oppo BDP-103D
2ch Marantz PM8004, Sony BDP-S1000ES, JVC T-X3 tuner, Monitor Audio Silver RX1, REL T3, Apple TV, Peachtree Audio DAC•iT
lr Panasonic 50ST60, Sony BDP-S5100