I keep forgetting the address of the Greek Font Society, which would be a less significant problem if they hadn’t changed their URI. I need to remember where to find them, though, because where else can you find a sumptuous array of professional-grade polytonic Greek Unicode OpenType typefaces for no charge?
I was taught on the standard Porson faces, but was mystified and charmed by Neohellenic when I first saw it (in Blass-Debrunner-Funk, I think). Here, though, you can pick up a digital interpretation of the type used for the Complutensian Polyglot, on which Neohellenic draws heavily. Just remember that the 16th-century mu without a descender looks sort of like an upsilon, and the nu with a descender looks like a mirror-image mu. The lower-case eta follows the shape of the modern upper-case — but you already figured that out.
Now, time to get some work done before I meet Rob Croop for lunch.