Here is my feeling on fancy cars:
Yesterday I drove a friend's Merc slk 350 convertible. Goes great looks good..blah, blah, blah.
However I drove out of town before I pulled over and put the top down because I felt like a pathetic middle aged man having a mid life crisis in that damn thing...and that is exactly what I looked like.
The beauty of BMW is that you get a fantastic performance car with a modest body. You don't look like a wanker driving a BMW, no matter what age you are.
The only convertible car I would be comfortable in would be a pre-70's Mustang.