I'll go with a proper rebate plane for anything over about 2 feet, even if I have to first prepare the blade from a chip or other damage. (I have the advantage of several rebate and combination planes to choose among and I like them all, so I suppose you might discount my thoughts as biased. Again, it depends on the user.)
My Record #778 used to give me fits. Back then it was easier, for me, to cut rabbets with a Stanley #45. After spending some time with the Record plane my rabbet cutting improved. Now just about any rabbet plane in my arsenal can be used to get the job done. For repeatability learning the ins and outs of a plane made specifically for the job has improved my results. Like Jim, my arsenal contains a variety of rabbet planes.
jtk
"A pessimist sees the difficulty in every opportunity; an optimist sees the opportunity in every difficulty."
- Sir Winston Churchill (1874-1965)