You are familiar with full-frame lenses/cameras.
On the M8 the mentioned lenses have focal lengths of about:
20, 28, 47, 70, 120 and 180 mm.
My choice would be to keep the 28mm (Leica 21mm) for landscapes+streetshooting, the 70mm (Leica 50mm) for people and the 120mm (Leica 90mm) as a tele. The...