Couple o' thoughts...
the post about AVerMedia having a 'built-in' decoder - WHAT? These are tuner cards for ATSC which is an MPEG-2 stream. ALL decoding is done in the PC using filters/codecs you supply. While the retail version of the duet has a version of s/w provided, the majority of users on here will not be using it. Many reported their s/w as crappy and buggy. All we want to do is tune ATSC broadcasts leaving recording, playback and decoding to your PC. Besides, if his Samsung 700 is doing the decoding wouldn't he be using SPDIF passthrough anyway? e.g. no decoding, just passthrough.
about newegg's FAST shipping - I've come to expect it! They are a d@mn good company and I very often get 1-day service if ordered before noon... I've even received stuff the next afternoon when ordered as late as 3:00! YES, they use 3 warehouses and if it ships from CA or NJ it will NOT be 1-day service and NO, I do NOT pay extra for 'expedited processing."
about why so many Open Box items - not everyone on here knows what they're doing! The egg has no tech-support so if you don't know what you're doing you're SOL. Their Customer Service is excellent and they'll return anything you're not satisfied with - within their policies, of course. That's why I always shop Open Box or Recertified items. Also, while their site says you may not get all the accessories, I've found they are just as complete as the OEM at full price - YMMV.
HDHomeRun directly into a PC - I have a buddy who learned this the hard way on his Win 7 box... using a switch to connect the PC and HDHomeRun resolved this for him as well. (He uses a WiFi as his primary net connection.) Your explanation was clear and technical - thanks!
and finally, I'm surprised to learn the OP has not dabbled at all on this OTA concept before now! So many are buying HDTVs with ATSC tuners (many are QAM-compatible) and never try using it! They just slave it to their STB and pay through the nose for programming. I'm glad you're coming around but realize this, you will get OTA broadcasting only - no ESPN, HBO, TNT, CNN or any of the cable channels you may be watching today. Although you might have another side benefit IF you have cable (modem) in your house, you might be able to tune Clear-QAM HDTV channels using the AVerMedia Duet and your existing cable. You might find you don't need the antenna OR any OTA if that works at your house, and with your "cable" provider. If you have no cable but DSL then NO, you have no Clear-QAM source... just my 0.02
BTW, the Open Box Duet is now Out of Stock. Gotta jump on these 'deals' when they're there!