What are you looking for in a chicken? Are you looking strictly for a meat chicken (grows to weight in 7-12wks) or are you looking for both layers and meat birds? (Meat birds are called broilers). Cockerals get bigger faster but they crow, so if you're in a suburban or urban setting, you won't want these.
Cackle's site says they have the following: (If click on the category, it takes you to the bottom of the page where they tell you what's included in each category and pricing.)
Jumbo Cornish Cross - these are the big white meat birds - they grow fastest
Red Broilers - these are the big red meat birds - they grow in about 12 weeks
Hungry Man's special - a mix of big white meat birds AND assorted (their choice) egg layer pullets
Frypan special - all cockerals, mixed bag of what you get - grow to size in 4-6 months
Heavy Barnyard special - mostly cockerals, some pullets, grow to size in 4-6 months
Special Heavy assorted - mixed bag of whatever the hatchery gives you, unknown grow out times.
Hope this helps you make a decision.