I was going to say the same thing. But then, my MacBook DOES NOT HAVE A RIGHT CTRL KEY. I... I can't begin to explain how annoyed I am of this fact. This, above all else, is the reason for why my next laptop will probably not be a Mac.
I use KeyRemap4MacBook[1] to map the enter/return key to control,
but only if held down. If you tap it, it's still return. Sounds
weird but it works really well, it's a large target, and it roughly
mirrors caps lock as control on the left hand.
Try remapping it so that the Command buttons, i.e., the keys next to the Space Bar, are Control. This was the position of the old Symbolics machines. To my hands, it makes Emacs much more efficient, since the rest position for the thumbs can be between the Space Bar and the Control keys.
I tried that and it worked great for Emacs, but it messes with normal OSX operation.