New Mac Mini...

YES!  You can add RAM yourself to the new Mac Mini!  It is just like the old one.  You should order one!  The Quad Core Mac Mini would be a Great machine for photographers!  I have one from last year and LOVE it!  It is much faster than I expected as well as small and quiet.  Just attach a USB3 drive to the new Mac Mini and you are set.  I would upgrade to the Fusion Drive if you can!!!

Kevin