Wow, I wonder how this new Alpina N63 compares to the S63 as far as responsiveness? They are making almost as much power as M now. And how can you argue with a 540hp touring. Change those Bentley-ish wheels to something BMW OEM and you are good to go.
I gather the B7 will get this newer more powerful engine soon too, including in the US?
And 408hp for the B3 GT3 is not too shabby for what I assume is a tuned N55. That's assuming it has some sort of warranty.