The WonderMill and Nutrimill both get rave reviews and both if I remember correctly come with a lifetime warantee... I looked into both of them along with several others...
When I was looking however I wanted 1 for emergencies (was still buying store bought flour) so I was wanting a hand crank unit... I bought the Family Living Grain Mill.. Works quite well.. Finally tried it out and liked fresh ground flour a whole lot better so I ordered the motor base for it... Now we have the best of both with or without power... Also has other attachment available like meat grinder, flaker,veggy processor..
