This is my plan for modding him: (excuse the crappy photoshop)
I like few things about this Mageneto:
-How compact SS Magneto is
-The sentinel base (since I'm planning to have my XMEN with Sentinel bases)
-All the changes that SS did recently.
That being said I'm not a fan of all the lines and the mesh sections on the suit...plus I need my Magneto to have his undies.