Best flour mill?

[smadaus]

I am looking to get a grain mill that can mill my dried and spent grains into flour. My preferred result would be to get a mill that is electric, can grind the flour to something I might buy in the store, can actually grind spent grain (some of them say not to mill grain that has been milled already) and is under $300. Does anyone have an suggestions or information on grain mills.

I have been looking at this one but it doesn't hold a lot so I would have to keep filling it.
NutriMill Harvest Grain Mill

I have also looked at this one but it states it can't mill grain that has already been milled. I am wondering if they would classify crushed grain as milled?
NutriMill Classic Grain Mill

I looked at this one but there is not much on it and not many reviews.
Mill and Herb Grinder

I appreciate any info you guys have. Thanks.