Blue Mountain Organics (BMO) is cheap and I'm having AMAZING results with it. Granted this is the first organic line of nutes I've tried, but given the results I'm getting, I see no reason to even try anything else. I'm only a month from seed and still vegging so I can't vouch for yields, but my plants look insane and are growing exponentially.
FFOF + BMO is a winner in my book.