A roller mill (2 rollers are sufficient) with at least 4" long rollers that are adjustable would be my suggestion. An adjustable mill allows you to mill grains other than barley and gives you an extra degree of control (important to control freaks like me).
EDIT: I voted "Other" because I built my own, and I like it a lot!
FURTHER EDIT: My mill is basically the same design as the Crankandstein, except the rollers are 3 times longer. Onescalerguy mentioned that it takes him several hours to grind 13 lbs...I can do 40 lbs in 15 minutes.
I bought and talked up my Porkert grain mill but i'm afraid i've been in serious denial.The thing does a great job but after grinding approx 150# of grain,i'm throwing up the white flag.1 to 2 hrs to grind 13lbs REALLY,REALLY sucks.My model doesn't lend itself very well to adapting to a drill chuck but i might be able to rig it at the risk of ruining it.I inquired about grinders in a different thread a few months ago and as i recall,more than one person recommended not scrimping on a good malt mill.Well i grant those folks big "i told you so"s.That said,any of those listed would probly work well.
Cheers
I've got the Phil Mil. It does a great crush for me and it was much cheaper than all the other mills. I've been using it for ten years. It only has one roller and the mounting system is cheesy but it works good. I have the post so I can use my drill to operate it.
I have the Barley Crusher and I have adjusted it to .035. It helped efficiency with my batch sparging. They also sent the mill before my personal check cleared the bank. I was pleased with their service.
I own a Barley Crusher, and am absolutely thrilled with it. It runs smooth, easy to adjust, and even cranking by hand, 13lbs is an easy task. If you hook up a drill, you can grind it all in a couple of minutes, and still have a hand free for a beer!
I love my Barley Crusher and I drove over to his buisness to pick mine up. Randy is a very nice guy and the crusher has a life time warranty on it plus its made in USA!
An update on my Porkert mill.I was able to adapt it to an electric drill and man,what a difference.Life is good again and i'm happy with my mill again .
Cheers
Well, I went ahead and bought the Barley Crusher. I haven't used it yet but it seems to be very well made and sturdy. Looking forward to trying it out! Thanx for all the replies, BTW