I agree with many points to the article. I was not aware that a "new" version was out, though. I bought a pair in 2009 for $80 or so, and was shocked to see prices skyrocket to $100, and then $150.
The M50's still sound good, they just aren't a great deal anymore.
My headphone of choice around that price range is now the Denon D1100, which goes for about $110 when on sale. I also like the Shure 840 when they are similarly priced at $120 or so.