http://www.bio.miami.edu/hare/diet.html
That should help with some stuff.
And this should help some more.
http://rabbit.org/faq-diet/
I feed Small World rabbit feed from Walmart. I don't have a problem with it at all, its got all the right percentages for what the rabbits need. I have a 2 lb dutch rabbit and she eats like a horse. Everyday she gets, 1/2 cup of pellets. 2 cups of greens; daily: cilantro, romaine lettuce; every other day: spinach, rosemary, parsley, basil. For fruits she gets, strawberry tops, blueberries, grapes, banana and apple; about 1 tbsp a day of fruit(probably WAY too much, but she does well with it and she loves it!) She gets unlimited timothy hay and fresh water from a bowl.
When she was a baby, I fed her a mix of alfalfa and timothy. I don't think you need to feed alfalfa when they're younger, I think just grass hay is okay as long as you're feeding an alfalfa based pellet. Which I was when my bun was a baby.
I've never used Oxbow because I think its insanely expensive and I don't want to pay for it. But I have used Sherwood, I didn't like it that much. They recommend that you feed unlimited pellets and they really mean it. My baby bun was eating almost 2 cups a day, yes 2 CUPS and she was still loosing weight and she had a dull coat. So I transitioned her onto the feed she has now and the rest of the Sherwood got fed to the chickens. Now feeding her the small world, she's shiny and she's maintaining a healthy weight.
I buy like 5 lbs a month of food and that lasts my one rabbit the whole month.
I don't think greens are necessary, but rabbits do really like herbs and lettuces. My rabbit loves grass too, so if you're taking your bun(s) outside, then they'll like grass too!
Hope that helps!