AlpineWhiteE46 & seelinger:
Yeah, SMG2 is quite convenient if you just wanna drive it like an automatic car (like my wife
The jerky motion takes some getting used to. I found that 2 things really helped. Either give it some more gas (and the jerkiness goes away), or start in 2nd gear if you don't have to make a getaway. Gets more jerky in sport mode but I've noticed that the car can be jerky in 1st gear when sport is OFF, whereas, the jerkiness tends to be in 2nd gear with sport mode ON.
I made my decision on the first test drive (which took about 45 minutes to an hour). Takes a little getting used to. Mind you, I was babying the car too, cause I had never been in an M3 before, and was driving a used '02 with SMG2. When I took delivery of the '04 SMG2, it seemed like second nature within about a week or two.
I don't think there's a difference in the regular maintenance intervals for SMG2 versus manual with the latest gen M3s.
Make sure you take it on a LONG test drive before you get SMG. I don't think you'll regret having either, but some people are manual die-hards. If this sounds like you, then get the manual.
Good luck and happy test-driving.