I now have a completely maxed out X5 4.8i. I have the V8, adaptive steering, adaptive drive, adaptive lights, and night vision. I found that it's good all around, but the Z4M is slightly faster and has better high speed handling. X5 handling in the twisties is excellent. I have now purchased
98,000 credits worth of stuff, and I have 6,000 in the bank. Can't wait for the next series.