Most recent/stable CFW available for the PSP?

Hey all, I just got around to making a Pandora's Battery (much easier than I thought), and now I'm waiting for my additional memory stick to come in the mail. In the meantime, I've been looking at the actual CFW I have to install, and... there's so many o_o I hardly know which one to pick, or even where to start.

So I'm curious, what is some of the more recent and stable CFW that has been released? The biggest thing I'd say I'm looking for is game compatibility and the ability to have add-ons/plug-ins. Any help is appreciated!

ME & PRO are the recent CFWs around. Both are pretty much stable, and since it require 6.xx firmware to run, the game compatibility is higher as well.
and of course you can install plugins on it.