A quick glance at the six, and its awesome, however if you keep looking at it 645/650 you begin to dislike it. I was sure I wanted it, until I actually drove it and experienced it.
But it all depends what you want, I also skipped on the m3 for a 335, but I'd definitely never get a six series it was a m6 even with the new redesign coming out.
Matter a fact I don't have the urge to get any other for a long time - that will change when I get married/kids, sedan/suv... than I'll get the x6m/7, or th e30 m5(best car eveR)
for now I'm contempt with my09 m sport, and I used to love the old jag's 80's