Mike, I can't speak for your M50v2 but I have the M50v4 as I said before and I love it. I also love the M5 which is higher fidelity and resolution. It's quite incredible how both of them can be so satisfying.

Do try to drop the tweeters of the M5 below ear level and you will be rewarded.

House of the Rising Sone
Out in the mid or far field
Dedicated mid-woofers are over-rated