Episode Zero 720p [Extra Quality]
Multiple terms separated with spaces all must match for the whole search string to match. Sometimes you may need to match any of the terms instead of all. For this purposes there is an OR-operator. In the next example titles having either 720p or 1080p (or both) are matching:
Episode Zero 720p
Why two other syntaxes then? The syntax with match-groups has wider usage than just seasoned TV shows. It can be successfully used to identify dated tv-shows and for other nzb-files not related to video. Variables $season and $episode were implemented before the third syntax was invented. They were kept, may be someone find them useful for anything. And they also help to explain how option series:name works too.
In the iTunes 10.6 preferences under Store, you can select whether HD downloads come in 720p or 1080p resolution. In the iTunes Store, movies conveniently list the file size for the selected format. A couple of examples: Hugo is 1.74GB in SD, 3.99GB in 720p, and 4.84GB in 1080p. Monty Python and the Holy Grail is 1.00, 2.91, and 3.65 gigabytes, respectively. However, to determine the quality difference, I looked at two (currently free) TV episodes: episode 1 of season 5 of The Big Bang Theory, and the first episode of Awake.
I first looked at The Big Bang Theory and admit I was a little disappointed. In most scenes, you really can't tell the difference between the 720p and 1080p versions, even when jumping back and forth between two QuickTime Player windows cued up to the same frame. I even suspected that the 1080p version was really upconverted 720p. But at the 4:02 mark, a juice bottle does appear noticeably sharper in the 1080p version.
1080p 720p I also had a look at the first episode of the new show Awake. Even in dark scenes there is always some extra sharpness in the 1080p version, but in brighter scenes the higher resolution version is significantly better. I certainly recommend the 1.75GB 1080p version over the 1.45GB 720p one. These two screenshots were taken at the 5:36 mark from the top left corner of the image playing back at 1080p (so the 720p version was zoomed, as it would be on a 1080p flat panel). This is a small detail, and the 720p version isn't that blurry, but this kind of improvement is visible throughout the scene.
The 720p, 1080p, and 2160p are all immediately available to watch. I highly recommend watching the 720p version first, and then deciding for yourself if you think the higher-quality versions are worth your money.