N
Nikita the Spider
I don't have any of those fonts on my system -- the text in question seems
to render in "Palatino Linotype". A better choice would probably be
"Bitstream Vera Sans" which has a good Greek repetoire and is almost
universally included with recent Linux distributions. Feel free to put it
right at the front of your font list as virtually no Windows or Mac
machines will have it installed.
I have Bitstream Vera Sans, Vera Serif, and Sans Mono installed here
under OS X. My guess is that arrived as part of my NeoOffice install, or
perhaps I even installed them way back when installed the X11 version of
OpenOffice. (NeoOffice is OpenOffice for the Mac.)