New M3 Owner - warranty, part sites, etc...

Hello folks,
I'm on the process of getting a 2008 M3 Coupe 6speed w/59,500 miles. I have the option to get and extended warranty w/credit union (good warranty, platinum) but I'm not sure if I should or simply put the money into the loan. I will be using the car basically for weekends since I have a motorcycle for the everyday drive...Suggestions? How reliable are these cars at this mileage? Also, I'm getting it from a BMW dealer and record shows all service being done at the same dealer for the last 3yrs. Another question, what is a good website to buy parts for this car (I had a 911 and pelican parts was great..did a lot of work myself)...for example, I have been looking for a clutch just to have an idea of price and it is nearly impossible to find for this model/year.
Thank you very much for your time!! Any suggestions, ideas, tips will be of great help!!!
Cheers!
Leonardo.

Motor is solid.....it's the other stuff along with the labor that will get you. Buy a extended warranty or find yourself a really good indy. Also check out the locals at Houstonmclub.com ...............Phil