Concerning the original post question about MT vs DCT:
I had a MT in my E60 M5 and now I have one in my F10 M5.
There is one thing with the F10 that is different from my E60 M5 so it's something for someone who is on the fence about it to keep in mind, and that is the rev matching. I didn't realize it had it when I bought it so it was a pleasant surprise. I consider myself pretty good at driving manual since most of my cars over the years (Z28, Z06, M3, M5) have had one and I did the SCCA Solo 2 racing for a while with them, and my previous E60 M5 had over 75K miles on the original clutch when it got rear-ended. But with the rev-matching I am having to learn not to blip the throttle because the car will do it for you, and better. With the rev matching you simply push in the clutch, let off the gas, and put the car in the gear you want, and the engine, very quickly, automatically goes to the proper RPM. And then it holds it for a second when you let the clutch out so you have time to press the throttle (this is under normal calm driving). The matching is so precise that you cannot feel the clutch being let out. When you do it manually you are never right on so you always feel some slight mechanical clunk until the engine matches the transmission, but with the auto-rev match it's exact. This is not just for the next lower gear, but which ever gear, even from 3rd or 4th to first, etc.... So that's really cool, but I wonder if there is a way to shut it off so I can keep in practice of doing it myself? The car is too new to me I haven't learned enough about it yet.
Jut thought I'd share this for someone going from an E39 or E60 manual to an F10 and thinking about a manual.
-Dave