I'd guess that if both cones are the same looseness, they're just fine. They may simply be longer excursion than your B&W cones.

There aren't many people around who have heard the M50v2s, so I would hesitate to recommend them. To my ears, the M3v2s were more similar to my M80v2s (and therefore M60s) than my M50tis (read v1s). That could easily be a function of the different versions, though.

I am the Doctor, and THIS... is my SPOON!