Best Protection: ASProtect 2 or Armadillo 4?

I'm currently using ASProtect 1.x and I'm getting ready to release a major new version of a program that uses this protection.

One of the things that both ASProtect 2 and Armadillo have of interest for me is the relatively short keys support (so many users don't even know how to copy-paste text and many email servers block emails with .reg files attached, so using the long keys of ASprotect is becoming more and more a headache).

So, how do you guys compare ASProtect 2 against Armadillo 4 in terms of protection?

I currently use some of the techniques recommended by ASProtect and the result is that my software has not been cracked for 10 months now

Thanks,
SM