Hope the test goes well, but the interactive experience of a car, especially a modern car like the E92 isn't going to match that of the motorcycle, but it will give you practicality and safety. I made a similar switch 7 years ago and got into a E39 M5 with similar power. Just don't expect the same experience as you bike. BTW, 100K Miles on as S54 motor is easy. You have to balance the cost of maintenance against the added cost of the upgrade. I just picked up a e92, but I still think the e46 looks good and may get one as a track car in a year or so.
Good luck with the test drive.
Current: '13 E92 M3 Euro Delivery
Wife's: E36 M3
Gone: E86 M Coupe; E30 M3, E39 M5