Chris,
Since you seem to want a small flock, you should definitely focus on production breeds. Commonly available good layers are barred rocks, rhode island reds, sex-links, australorps and buff orps. All good layers.
Cochins are said to be slow to mature and mediocre layers. Lemme tell ya: my year-old banty cochin has NEVER laid a single egg. She doesn't display the bright red comb or wattles yet, in fact her headgear is still rather stunted. Who knows if that dumb bird will ever go from "lawn ornament" to "layer".