Hi Eton
Just saw this. Been back to Miami Beach in December (usually going there for the Art Basel Miami thingy).
I recommend Indomania for a great Rijstafel and cosy, friendly atmosphere. Had a great time there, it's not upscale and you get decent prices (not one of Miami Beach's fortes, usually).
For Breakfast and Snacking check http://www.lasandwicherie.com/, for Budget late night binge eating Tyrannosaurus Mex right beside.
For decent lunch and a good wine list I'd go to the Pelican Cafe on Ocean Drive. Nice terrasse for people spotting.
Oh and if you need that extra energy kick go to one of the many small Cuban spots and order a Colada. Enjoy with care, it will make your hair stand up!
Most of the fancy famous restaurants are ripp offs in my opinion. I tried a lot of them and was almost always disappointed.
Have fun!
Val.