I used to rent Zipcars, and once a year I'd treat myself to their BMW at $100/day. It was the most enjoyable car I'd ever driven. When I got bored with my Honda Civic, I decided to splurge, so why not go for the best treat I'd experienced?
This is a beautifully crafted car. I've been to many auto shows and seen most new models up close. Interiors are woefully cheap in many cars - even expensive luxury and sports cars. This car surrounds the occupants with quality and style.
The BMW has terrific acceleration after a slight lag when you first step on the gas. In Sport mode, the automatic transmission revs with smooth speed that puts you ahead of the line when the stop light turns green. Responsive and powerful.
I don't have the nav but the audio system sounds rich and full even when competing with open windows and sunroof. HD Radio has some interesting new channels and all the FM digital stations are clean. 10 speakers deliver the sound without distortion.
It's not ostentatious, but everyone knows the BMW brand and look. You're not going to overpower the neighbors, just impress them.