I've had parrots for 6 years (budgies and lovebirds) but I also fostered couple conures, cockatiels and an amazon. They are very inquisitive creatures and definitely bring a lot of happiness (and mess) into a household.
Diet wise, I would say if youre looking for something equivalent to dog raw diet it would be fresh blend of various seeds, sprouted seeds, nuts, berries/fruits/veggies. If you buy premixed seeds, make sure that theyre not preserved with Ethoxyquin or BHA/BHT or have artificial colors.
I'm not a fan of Zupreem, its mostly made of corn sorta like an equivalent of Science Diet. Its been couple years since I owner birds so I'm sure theres more variety now, but I used to feed Harrisons pellets which is organic food and decent quality.
Harrison's Bird Foods is a family of certified organic pet bird diets that were formulated to make your bird as healthy as it can possibly be.
As far as a seed mixes go, I would buy simple blends without additional vitamins/minerals added because they are pretty much pointless since the seed is coated during process and when the bird hulls the seed, they do not consume those supplements. I had pretty good results with Volkman brand:
Volkman Bird Seed: WindyCityParrot.com, Bird Food, Parrot Food, Parrot Cages,Bird Cages, Aviaries, Bird Toys
I have also bought Higgins, which is a basic seed mix, but very affordable:
Higgins Food: WindyCityParrot.com, Bird Food, Parrot Food, Parrot Cages,Bird Cages, Aviaries, Bird Toys
You can find raw unsalted seeds/nuts in bulk at health food stores which is cheaper then buying from speciality places, I would give these to my larger guys few times a week as a treat.
Smaller parrots always enjoy millet spray, I used to get it in bulk because the ones at chain petstores are very thin/flimsy looking.
Another thing parrots love is cooked foods, again, you can make your own blend, I've used Beak Appetite brand with little birds because it lasted a while, but for larger parrots it would make more sense to make your own.
Even in the morning I woud have some leftover oatmeal (no sugar or milk), so I would chop up some apples, add raisins and walnuts and give it to my birds which they absolutely loved. They would make a huge mess, but it was their favorite treat.
As I mentioned before, sprouting is very healthy and beneficial to birds health, mine would run around the floor and nibble on the grass I've grown for my cats. But I would reccomend getting a seeds specificially designed for sprouting and make a fresh batch, they tend to go bad very fast, so its important to research on how to properly grow/store them.
heres one of the many articles:
Sprouting For Healthier Birds
As far as general feeding guidelines go, its more of a personal choice what you want to feed, I always relied on philosophy of giving my pets a lot of variation, they always had access to pellets in the cage, but in the evening when I let them out to fly, I put the seed dishes out and they would snack for an hour or so. Birds are prone to obesity, fatty liver disease, cancer among other things and its mostly due to the high fat content in seed diets and lack of exercise. Also since some of the birds I've gotten were in rough shape and major seed junkies, I would transition them to pelleted diet in order for them to get the neccessary vitamins/minerals that they would be lacking in seed diet because most parrots are notoriously picky and will only eat the seed that tastes good to them. Once they were healthy again, i would introduce a healthy seed mix, but feed it sparingly in addition to healthy pelleted diet, fruits/veggies, sprouts and cooked foods.
Anyways, hope this helps, feel free to P.M me with any questions.