I previously owned a Chrysler Sebring convertible for ten years. For me to say that this car drives MUCH better would be an understatement. I tested this and the IS 250 and although there is nothing bad about the Lexus, the BMW is just a little better in every way. Exterior look, interior design, and drivability. I am not a 'track' driver and the performance package in my opinion is unnecessary if driving isn't your hobby. The standard suspension and steering is very enjoyable. If you take long trips and have the performance suspension, pray that they just paved the roads. Otherwise you'll feel every bump, dip, and stone on the road. All in all, the BMW is just a great car. Worth every penny!
The turning radius is great. Awesome engine. And I even have to say I love the built in garage/gate remote. My previous car didn't have that.
Cooled/ventilated seats would be great. It gets hot in Phoenix. A sunscreen which would cover your FRONT windshield when you park would be excellent.