WHat do you mean by this whole overkill and retarded business?
You just said earlier in teh thread that you hate to see engines getting bigger and bigger. With the turbo setup, BMW is getting 300 bhp out of a 3 liter engine for less money than they would have to spend to get that same power NA. Then you can remap the engine managemnet system and boost your HP to over 350 for relatively cheap.
Instead of going up to a 3.5L to compete with the IS350, G35, and whatever MB is making these days, BMW decided to keep their engine small and get power a different way.
ohandbytheway, the 2008 model year will feature the 528i and 535i, for your pleasure.