WordPress 2.5 RC 2 has been released alongside with a short screencast covering the new dashboard and uploader and Release Candidate 2.
I will be holding on to the upgrade to RC2 as the gold version will be out before end of this week.
Download: WordPress 2.5 Release Candidate 2
What is the best plug in that you would suggest?
i would say depends on what you need. There is no such thing as best plugins. Is more of what you need than you get a plugin to fill your needs.