History: BMW vs M vs Alpina?

Posted by revocer@reddit | askcarguys | View on Reddit | 5 comments

It seems that Alpina has been brought under the corporate umbrella of BMW, just like M.

Historically, how were Alpina and M perceived from the car guy community? And how have they changed since being brought under BMW? Are they still worth the extra cash? Or are we better off tuning it ourselves?