Yeah, basically anything after the U series models (U50 or UT50), which would include the ST50, GT50, and VT50 use a very effective louver filter. It's very good at minimizing glare. The model you purchased has no type of AR coasting on it which is why it was so reflective. The Samsung E7/E8000 also have a really good AR filter, although it isn't as good as the Panasonic.
ht Panasonic 60" ZT60, Monitor Audio: Silver RX6, RX Centre, Radius 90HD; Martinlogan Dynamo 700, Marantz SR5006, PS3, Oppo BDP-103D
2ch Sony KDL-32W650A, Sony BDP-S1000ES, Marantz PM8004, JVC T-X3 tuner, Monitor Audio Silver RX1, REL T3, Apple TV, Peachtree Audio DAC•iT, Sennheiser HD598
lr Panasonic 50" ST60, Sony BDP-S5100, Apple TV
pc Energy CB-5, Audioengine D1, FiiO A1