Why S85 (E60 M5 engine) is not discussed here? Yes it is a V10 but the same displacement as the E39 M5 engine (5L). It does fit into the e92 M3 engine as well. the S65 is very similar to S85 with 2 missing cylinders. I would prefer S85 over S65 in my M3 any day. ~25% higher hp and torque.
BMW M3 E92 - Silverstone II