I've noticed (by reading posts in the AVSFORUMs) that PQ seems to differ from one Verizon FiOS TV service area to another. I am located in Northern Virginia, (Fairfax County, near Dulles Airport).
The only consistent PQ comments (across different areas) I've read indicate that HD is outstanding

on FiOS.
However, I have seen some posts where people indicate
all SD channels (except for the local analog ones) are very good, while others (including myself) indicate
some SD channels are very good, while
others are not so good. My previous provider was DirecTV, whose SD PQ, IMHO, was
not very good. I had read here (and other places) that FiOS SD PQ was almost "DVD like" for all their channels. I personally don't see it. As I indicated, some channels are very good (almost "DVD like"), and others not so good. The "not so good" ones are as bad (or maybe even a little worse?) than DirecTV.
First of all, what exactly is the "CO" that others have referred to? Some previous posts in this thread talk about the local Verizon FiOS "CO". I assume this is the local FiOS channel distribution center that receives the signals from the various providers and distributes them on the fiber? If this is the case, wouldn't the providers for the national SD channels be the same from one CO to the next? Or might there be some COs that have different providers that account for the PQ differences?
For the record, I am using a 23" Sony HD LCD and a 30" Toshiba HD Tube TV.