IMO i'd go heritage before I went organic. I've found Organic doesn't really say anything about flavour, and farms that focus on Heritage breeds may not always be "organic" but they definitely treat their animals with a lot more respect. In contrast, a farm can be letter of the law organic and treat their animals like garbage and produce awful meat. Also, if you're going over say 12 lbs, you're probably better off getting two smaller birds. If you do choose a big bird, Spatchcocking is your friend when it comes to whole poultry. Heck, even just cutting it down the middle to get it to lay flat is a huge plus.a 15lb turkey, which was organic, which wasn't heritage, and had about as much flavor as a ream of copy paper and still cost sixty fucking dollars.