Buying a BMW M3 E92 - things to consider?

[Pig benis]

Hello folks

I am now in the fortunate enough position to buy a car I have wanted for years, and I am ecstatic to say the least.

Over the years I have had hot hatches and now currently drive a Subaru Impreza WRX, which image aside, is a superb car. I haven't actually owned anything quite like an M3, or any of the prestigious brands.

So, I do have a few questions that would be very helpful to know the answers too before I commit -

1) Running costs, servicing prices at a BMW dealer and specialists?
2) Does every M3 E9* come with £500+ RFL?
3) I've heard that tires need to be replaced very frequently, is this true?
4) Are they reliable? Any gotchas to weak parts?
5) Fuel is not a concern, as I do max 6k a year and all for pleasure. I currently run my Impreza on super unleaded, does the M3 need the same fuel?

Please feel free to add any ownership stories, as I am interested to hear them.

Thanks a lot
Vince