Tell me why I should or should not trade in my 01 Integra GSR on this. This would be a daily driver that would see about 6 months of winter use per year. I normally ride solo. Maintainence/repairs scare me on the M3. It has 138k miles. My GSR is problem free, has 101k on it, but I've always wanted an M3. What kind of extra costs should I expect w/ the M3?