6.1.0.4 since my 6.2.1.1 had a meltdown and my board got screwed so to be sure it wouldn't happen again (happened to another friend) I down-graded to 6.1.0.4 Not sure how many hacks though. Not all of them, that's for sure.
I don't want to spend the time on making it unique like I want it to be. I'm going to be opening a new site in a couple months (with my second UBB license) with a different name and a completely new look and functionality.