Ford has the Mustang, Porsche the 911, and BMW the M3 and M5. Sometimes, this results in other great offerings going ...
If a quick BMW sedan is what you're after, you don't need to spring for a new M5 when you have this as an option.
The current-gen BMW M5, also coined the G90/G99 ... If you're okay with buying used, and you also want a quick Bimmer sedan, the G30 M550i xDrive deserves your attention.