I purchased my K-Tec/Blendtec Kitchen Mill several years ago. Grinders have been updated and revised since then. Because the purchase of a grinder is very personal, I would recommend reading many different reviews before purchasing one. There are several characteristics that differ with each mill. You'll need to decide how important these characteristics are to you. You'll also have to decide how much you are willing to spend.
Because I haven't personally used most of these grinders or tested them myself, I highly recommend perusing the following sites which review, demonstrate and/or compare many of the grinders. The Walton Feed grinder site is superior for reviews of all the manual grinders and a few electric mills. Some stores, like Emergency Essentials, will let you go in and use the grinders and feel the fineness/coarseness of the flours. You might also ask your neighbors if you can try their grinder to get a feel for which grinder you like best.
Great Grinder Information:
Walton Feed Grain Grinder Comparison Pages
The Church of Jesus Christ of Latter-day Saints
Safely Gathered In - demonstrates the Whisper Mill (now called Wonder Mill)
Everyday Food Storage - Good overview of pros/cons and pricing. Does have a bias towards the Wonder Mill, which they sell.
You Tube - Videos of many different mills being used.
Choosing a Grain Mill
Casaubon's Book - Grain Mills
See the comment section for some additional information about grinder "noise" and warranties.