vBulletin vs. phpBB vs. IPB

Which one do you think it's better?
I go for phpBB, yes I know it has holes, it needs to be updated every little, but I like the open source projects, plus phpBB is free, & when it's MODed, it can be much better than any other forum.

I also tried IPB (old 1.3 ver), it's ok, but I found it little complicated to use. Dunno how this ver 2 is, haven't tried it.

for vBulletin, I tried a demo somewhere, it's good, but again, it costs. I just don't know if vBulletin has ability to add MODs also? Anyone knows?