I bought the core Marvel book a couple of weeks ago. It's a great book. Nice system. Doesn't depend on luck. You allocate stones (energy) into your powers. Certain abilities let you switch these around on the fly. i.e. spider sense let's you readjust your point allocation after you see what your opponent is doing.
A lot of the iconic Marvel characters are in the book, stated out. Spidey, Iron Man, Silver Surfer, etc. It's also pretty simple to build your own superhero with their rules.
I haven't GM'd this yet but I would highly recommend it if you're into Marvel, or even if you just like looking at new systems.
Gary