Heres a good chart comparison: http://www.sagehenfarmlodi.com/chooks/chooks.html
Blue Maran: has a really beautiful color and lays an unusual dark brown egg. Marans come in lots of colors but blue is my favorite and luckily there's breeder of just that color. They don't lay as many eggs as some of the others but if you tried to sell eggs, these would likely be popular.
Buff Orpington: chunky little golden colored chicken that lays light brown pinkish looking eggs. Known for being friendly.
Black Australorps: black obviously. Feathers get a pretty green irredescant color to them too. Broke records for most number of eggs (355 in a year or something). Their eggs are pinkish brown.
Dominique: all the birds I've mentioned have been "heritage" breeds but this one has more heritage than most, I think. I see this chicken and think pilgrims. They're not as chunky and slightly more graceful than most the other chickens I've mentioned so far. Their eggs are a light brown but not pink. More of a yellowish brown.
Speckled hamburg: this little chicken is one of the prettiest but it's flighty too. That's good for free range birds that need to escape predators though. Their white eggs are small just like them.
Rhode Island Red:
That's the chicken in the back on the ameraucana picture. Their feathers are irredescant. Eggs are medium brown and they lay a lot!
Deleware:
Aracaunas:
These are rumpless chickens with huge feather tuffs on their cheeks that lay blue eggs. They're really hard to find though in my parts. I've all but given up. They come in all colors