Oh man, I was driving this one with 530 hp a few months ago. It was the most balanced and perfect car I have ever driven. Very fast, very comfortable, you don't break a sweat while driving this. Amazing brakes and you are basically always 30 kp/h too fast lol.
50-70% cheaper than m5, better sound than m5, comfier seats than m5 and if you do stage 1 tune for it youre looking at 670-680hp. Ecu costs around 500-1500 so you save alot money and ez m5 killer after this ecu tune