EDTV will give me better viewing on non-HD sources and TiVo than HDTV? (Perhaps I should ask, will HDTV give me worse viewing than EDTV on these sources?)
Yes the Pansonic EDTV pixel format fits the DVD/TV format optimally and it does a farily good job of down scaling HDTV sources. I saw both EDTV and HDTV Panasonic models side by side working off an HDTV source and I would say that the scaled down HDTV signal on the Pansonic EDTV was impressive...as good as a DVD and comparable to the full HDTV on the more expensive Panasonic model, but of course not as high definition as HDTV, noticable pixels and graininess up very close.
Apparently scaling up is tough as data has to be "created" and lines become blurred (some HDTV's with fixed pixels have better algoithms than others for up scaling - so it is worth comparing if you definitely want HDTV but watch a lot of regular TV or DVD's)
...scaling down is quite a bit easier for the TV's algorithm and a nice clear image can usually be retained when it is scaled down (making less data from more data).
As for HDMI - I am told that in future some pay per view cable/satellite services may only come in HDMI format so as to limit piracy...if true, then it would be annoying not to have an HDMI input if you end up using those services.

