I've got both the SR007 and SR007 mk2. There are some initial impressions over on the Stax thread. If I had to boil it down to a math formula it would go something like this:
SR007 mk2 = SR007 -F +>B+>I

Translation: Omega II mk2 = Omega II minus Fart plus increased bass plus increased impact.
They also cosmetically match my equipment.
In the interest of full disclosure my old Omega II has developed some issues with channel imbalance and are currently on their way to the Stax hospital in California. The mk2 was compared with these less than perfect pair. Since this problem is a recent development, doesn't show it's ugly head until about 1 hour of playing, and I've been listenting to the O2 for several years I think these impressions are fair.
It also seems like at least one member may have a defective mk2

, mine seem to be fine.
I'm going to post some of this over on the Stax thread with some other tidbits.
