Best is a pastured chicken. But they are both smaller and more expensive. They do roam the pasture and eat all the little things in nature chickens should eat. And the bird tastes fantastic roasted with salt and pepper. I really can’t afford it because I need two of them to feed my family.
Next best, and very close in taste, is Mary’s organic chicken. They sometimes go on sale at whole foods in CA, don’t know if they go far across the country, but there may be other farms with good tasting commercial chicken.
And don’t ever buy chicken broth because it is all filled with msg, all of it. Even the organic boxes, even the cans that say No MSG on it. They all have it, every single one. I know because it makes me deathly sick. Any soup in any restaurant unless they make it from literal scratch which is 0.02% of restaurants, is made from msg.
Nearly every rotisserie chicken everywhere is full of msg. They spike the water they inject it with before cooking. That is why each bite makes you HAVE to have another bite.
If you want good chicken soup, throw your organic chicken carcass, after carving off the good meat, into a crockpot and fill with filtered water. Add a few tbsp of vinegar.* Cook on high 18-24 hours, then add vegetables, cook another 8-24 hours. Strain, salt to taste. There is the chicken broth you love. It doesn’t make you need another spoonful like the boring umami addictive msg broths. It makes you delight in the taste. There is a HUGE difference.
*The vinegar is to get all the goodness out of the bones. This is why you need an organic bird.
That's a LOT of cooking!