|I can provide a bit of advice here.|
For HD reception, the antenna you choose is key. Can it be mounted on your rooftop? Can it be outside at all, or does it need to be an indoor model? If inside, do you have an attic you could put it in?
I have a 1 By One flat leaf antenna inside my home, but reception is hit-and-miss. Bad weather, which around here is mostly light rain, can affect the signal. Sometimes, even in good weather and for no reason I've been able to determine, the angle of the antenna has to be moved slightly to get a clear picture without pixelation. Overall it's been a little frustrating.
However, if I was able to put a larger aluminum antenna in my attic (or certainly outside), from everything I've read I'd get much better and more reliable performance.
When OTA works, it's wonderful since the signal is not compressed like on cable or satellite. You get a crisp, clear picture that you just have to see.
Ironically, I just went back to Comcast with a 2-year deal to use with my TiVo. Hopefully they won't raise the taxes to the point that streaming would be less expensive, but streaming was getting overpriced and it was time to say goodbye.