Buyer's regret... I had that too, when I pulled the trigger for my F13 3 years ago. I knew I should have waited for the M6, but I was weak-willed and my resistance was futile. A year and a bit later, when the new M6 came out, I wept for days because wifey said "I told you so, and now your bank account says
NO" (well, she's the one saying no, but since she's also the banker, it's the final word).
So I'm stuck with a F13 640i when I should have waited for the M6, but at least she bought me the X5 as a make up birthday present earlier this year, so I'm a happy boy once again.
Buyer's regret. Been there, done that, bought the T-shirt.
That's why I'm now sitting pretty and waiting quietly for the i8M....