The 645 is truly "sport" luxury. Not nimble and quick but muscular and responsive. The extra horses of the 650 should help. The iDrive is not difficult...if you can't figure it out you most likely can't afford the car anyway!
The shark look is truly the most attractive feature. One of the most attractive autos I've ever owned.
The steering wheel's a little thick with the full padding.
† Edmunds.com received the highest numerical score in the proprietary J.D. Power 2014 Third-Party Automotive Website Evaluation Study℠. Results based on responses from 3,381 responses, measuring 14 companies and measures third-party automotive website usefulness among new and used vehicle shoppers. Proprietary study results are based on experiences and perceptions of owners surveyed from January 2014. Your experiences may vary. Visit jdpower.com.