I guess I just am going to have to post after all...
I have not owned and M3, but I have handled Brett's and one in a local store. While it is nice camera - well made and with a very fine finder, I do not find myself wishing for/lusting for one. I can understand why people want one - it is as nice a camera as has ever been made. However, there are, to my minds eye, other cameras that are as nicely made, with nearly as fine a VF & and are a heck of a lot cheaper. If you don't have an investment in M mount glass, a Canon 7 or 7s will give you a camera that is as well made, has several advantages (swing open back, accurate built in meter), nearly as good a VF and, in the case of the original 7, only one significant disadvantage - the lack of a built in shoe.
I am not telling anyone who wants one that they should not buy a M3 - but I am saying that anyone on the fence should carefully discern just what they really want and need. And never forget that what you want is often very different from what you need... 😱
William