I use Pragmata as my programming font. It isn't free, but I've used it every day for years, so it certainly has justified its cost. Visiting his site, I see there's now a pro version, so I'll have to upgrade.
That's a really impressive font actually. I don't suppose there's any kind of trial version you're aware of? I don't want to splash out that kind of money unless I'm sure I'll keep using it.
No I don't think so. There is the basic set that you could get as a trial. I really love it, but as these comments show font choice is very much a personal thing.
http://www.fsd.it/fonts/pragmatapro.htm