I agree with Greyfield's, but I'll add my own two cents in the form of a breakdown of a few of the dual purpose breeds (based on my experience; your mileage may vary):
1) Orpingtons: Very popular right now, largely because they are big, fluffy, gentle and good-tempered, but don't let the good folks fool you--they really don't lay that well. I've had them from three different sources, and they never came close to my RIRs or my Delawares. I finally stopped raising them because the feed to egg ratio was too poor, and I don't process that much. They do dress out well, though. So if you lean toward either pet or meat
they're the way to go.
2) Rhode Island or New Hampshire Reds: Eggs-o-rama. They lay the best of the dual purpose breeds, especially the non-show varieties of RIR, so if eggs are your interest, you might consider them seriously. I keep a few RIRs just to lay eggs. Mine are "smart" for a chicken and very, very friendly, but that's unusual for a RIR. The roos can be mean.
3) Plymouth Rocks: Reliable at everything and great at nothing, they are just a good solid farm chicken with a nice disposition. They make good pets, and the show-quality birds of the barred variety are stunning to look at. The common white ones make for easy dressing out during processing and can be quite pretty themselves if bred well.
4) Delaware: Ditto Plymouth Rocks, except they lay a bit better. I'd say right between a Rock and a Red, which accurately reflects their pedigree. They also have the advantage of white feathers for easy dressing and a nice, clean carcass. Plus, heritage lines are really rare, so if you can find some, you can say you're raising a rare, heritage breed. Some hatchery lines have a good bit of production red in them, from what I've gathered, and they can lay almost as well but can also have the mean roos.
Again, this is my experience, but I do think it pretty much agrees with the Henderson chart for the most part.