The ES6100, ES6500, and ES6900 all have semi-matte screens, as 6 series models this year don't use Samsung's Ultra Clear (glossy) panel. They are not completely matte, but close enough. If you want 3D, then your choices are narrowed down to the ES6500 and ES6900. The ES6900 adds in a dual-core processor and micro dimming over the 6500. I'm not sure if the 55" 6900 is available yet, but the 50" just came out. It's a BB exclusive
You can also check out the Sharp LE845/847 model - although it only comes in 60".
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