if were talking about the sound, its a hard one. i love the sound of a v6/v8 at low revs and i love the sound of a BDA being thrashed but i dont think you can beet the noise of a turbo'ed v6 (but then in biased)
Oli they are pretty good, but noisy compared to the new AMG models which are naturally aspirated. Somehow the V12 versions which are turbocharged seem to be smooth and as quiet as a whisper even at speed and under hard acceleration.
Supercharging is probably the best of the forced induction methods, but for me, I would still prefer an atmospheric pressure system.