I had 2 M3s and 1 C55 and I did test drive all new M3, C63, and IS-F. I bought this car b/c never had super sedan from Toyota (also I had modified supra). Advantage - ownership cost cheaper, better reliability, better fuel economy than M3 and C63. Disadvantage - resale value lower than M3 (not C63) even though "exclusive IS-F", M3 and C63 are more fun to drive, better build quality, and better handling than IS-F. No manual trans vs. M3 (not C63), slower than M3 and C63 (not much diff. but still)
† 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.