I am a little surprised about the comments regarding increased running costs and depreciation over the 4/4. Also it sounds as though the M3W has a few mechanical issues that could make ownership a little challenging.
It's well documented on here that the early M3Ws were under developed but from 2014 most of the major issues were sorted. Pre 2014's can be upgraded (Comfort steering, urban cooling, Centre compensator, NVH kit and improved mounting of the rectifier). This has hit the resale values but hopefully the depreciation has bottomed out now. To put it into context, my late 2013 was bought for £32k and is now valued at around £26k. So in round terms 20% depreciation over 3 years and 13,000 miles which is pretty good compared to the vast majority of vehicles. Of course, this only has any relevance if you ever sell it which I'm not about to do anytime soon.
For me, the M3W is an amazing piece of kit which never fails to put a smile on my face. It attracts an enoumous amount of positive attention from passers by and other road users and just makes you feel good - what more could you want?
