I do not like to buy grains online. They are so heavy you pay a fortune for shipping. It is much better to try and find it locally if you can. Usually fresher, too.
No one has mentioned the Golden Grain mill (goldengraingrinder.com). I am planning on purchasing one of these in the next week or so. I have burned up a Whisper (now Wonder) mill, and a NutriMill. This one seems to be very well made and should last more than the 4 years the others have. At least I hope so. It is more expensive, but if it lasts like they say, it will be worth it. And it has an optional hand-crank attachment to use in emergencies.
I read about all you folks who use the hand grinders with wonder. A half-hour for 4 cups--EEEKK!! Since I grind enough for a triple batch (9 loaves) at a time, it would take me 5-6 hours just to grind the grain! No way that's going to happen. I will use my electric mill, thank you very much.