Let me weigh in with my results now that I've got libdvdcss installed...
Avengers still failed, but after an initial failure and a reboot, Mad Max ripped and the .iso appears to be good. Avengers was, predictably a tough nut to crack... Slysoft cut through it like butter, but my other commercial solutions needed some tweeking in order to rip it right.
So, I'm going to say that K9Copy is a pretty impressive solution for the price. It doesn't seem as polished as Calibre, and it is too bad it isn't as cross-platform as Calibre (or is it? Mac and Win version available too, or not?) - but it'll do what it says it will. I'm impressed that it was fairly easy to resolve the issues. Now if I could just get the display to work in 1920x1080 through my KVM switch.
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