as much as I like the current V8, I think you will regret getting the e92 once the f80/82 comes out lol; you'll feel your car is outdated in short time and wish you had gotten the new model and look new for the next 5-6 years.
I had the option to get the new 2012 facelift C63 when it came out, but I chose to buy the 2011 brand new because the old look is so much more aggressive. After 6 months, I regret it because once you see all the new models around the streets, the old one really looks outdated although it's not really.
I could get the E93 right now its hot as s***, but I ll just wait until 2015 for the F83 and look new until 2022 if the world still exist by then
