Ouch, I was wondering how long it would take for the negative nancy to pipe in and say this. Yes, my wife and I went to test drive one a couple of years ago. We didnt have the money for a new car at the time, and one less kid as well... it seemed perfect.
When I found an 07 at the auction for $9k, I decided to jump on it, although we hadn't re-evaluated since the baby was born.
Now, wanting this car has a lot more to it than just wanting to drive "a coupe reminiscent of my younger days"... Its a financial decision. The m5 is generally cheaper to buy, own, and maintain than a van or suv, and gets better MPG. I'm tight for cash right now, and spending MORE money on a larger vehicle that will still cost MORE money in fuel to drive, well that just seems silly if I can make this work. The fact that it is fun to drive is icing on the cake!
But I took your advice last night and packed up the family for our first test trip: COSTCO! We bought a folding table, amoung other things. I put half the rear seat down, put most of the stuff there, then slid the table standing up in the aisle between the two middle seats.
The car passed our test so far! In fact, my daughter really liked having the groceries next to her instead of in the trunk... she could be "in charge of it", and poke around at the food, etc.
I'm definitely leaning towards keeping this.