The high-revving E92 M3's V8 is good for many things. Putting one under the hood of a 135i, though, might just be the best thing you can do with the old S65 engine. My position on the 1M would be ...
In the case of the E46 and E92 generations you could even hedge your bets and have one of each… The E46 M3 arrived in 2000 and was a return to form for BMW M after the E36 that so disappointed ...