Your choice depends heavily on your and workflow : Recommended Model All-around Best Digital Leica M11

Slimmer body closer to film Ms; excellent sensor performance [17, 25]. Leica M3 Largest and brightest 50mm frame lines in any M [10, 28]. The "Forever" Camera Leica M6

Integrated EVF and focus peaking for perfect sharpness every time [19, 39].

The most popular metered M. Its built-in light meter makes it the "practical" choice [32, 24]. Users on Reddit value it for its "insane" build quality and smooth film wind [42].