Interesting
I pulled up the owner's manual for this set, and it showed it as only having an NTSC tuner. According to it, the poster WOULD indeed need a converter box. Am I mistaken ? Where did you see that the TV has an ATSC tuner ? 
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Living Room
Panasonic PT-50LCZ70 50" 1080p HDTV, Sony Playstation3 80 Gig, Onkyo HT-R667 7.1 AV Receiver, Yamaha NS-6490 Main, Side and Surround Speakers, Cadence C-17 Center Speaker, Acoustic Audio HD-SUB15 15" Subwoofer, DISH ViP 722 HD DVR, Panasonic DVD Recorder/VCR, Monoprice cables
Den
Viewsonic NX2232W LCD HDTV, RCA RT-2500 5.1 AV Receiver, ESS-308 Main and Surround Speakers, RCA RT2500 Center Speaker Onkyo 10" Subwoofer, DISH ViP 211 HD Receiver, Magnavox Blu-Ray Player
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