Well, Dave, I swear by Noteworthy. It's stable and easy to use, and the sheet music it prints out is very nice. I squabble with John in Brisbane and others who insist on using MIDI with embedded lyrics, but nobody has actually come up with a standard for embedded-lyrics MIDI. Until that happens, I'll use Noteworthy. My $40 registration has carried me through many upgrades. It used to be that you could do a lot with the unregistered version forever, but I understand there's a time limit on the unregistered version now.
You can download Noteworthy here (click).
-Joe Offer-