Greetings all, my first post here as I have not owned a BMW before but am looking to purchase one sometime in the next 6 mo. or so. I've narrowed my choices down to either a new 535i, used '06 or '07 550i, or (if I can find the right deal) an '06 750i/Li. I like the idea of a V8 just for the sheer fun of "instant on" power but the turbo inline 6 is just as fast, just a different feel to it. Seems I can find all three of these somewhere in the same price range, but I do worry about what kind of problems I might run into with a 750 in this range (buybacks, accidents, etc). Any insight would be appreciated.