i know you're pretty attached to the KD30XS955 (i was too for a while) but it is expensive, and there are other options if you dont trust those online sites. In my opinion, for something as expensive as a tv, I want to see the model I'm buying before i purchase it (at the least the look of the packaging). Also, I wanna take it home myself, because something like this can be easily damaged if not properly handled, and handling something that weighs well over 100 lbs is not always easy.
I decided against the KD30XS955 mainly becasuse of its price tag and availability, but also becasuse I'm in college and i need something thats somewhat moveable when i change where i live. I decided to get the Samsung slimfit tv (model TXR3079WH). I know this is a controversial tv b/c of some geometry issues reported, but i can't notice any on my set. The samsung may not have the build quality of the sony, and it doesnt have a cablecard slot, but it offers everything else the sony has for 400 dollars less. If the "sony" build quality (dont get me wrong this set has a great build quality - i just see sony's as the best) and cablecard is that important to you, then pony up the dough. If not, you will still get a very beautiful picture with the slimfit. Don't let the people who talk about the geometry issues turn you away from this tv, i think if thats the only thing stopping you from considering this tv, at least check one out in a store to see for yourself.
Besides that tv, as far as 30" HD crt tvs with ATSC tuners go, you can also look at the Phillips 30PW9100D, which i think is even cheaper than the samsung although i dont know what people think about this tv.