The bias hasn't disapeared in here then.
Due to it being a right pita, typing all this out on the xoom has held my toungue.
Been reading a lot of posts here for the last week but decided to break my holiday home from home silence since I'm housebound at the mo due to the wee man being ill.
Tends to be the train of thought from most Nvidia users though.
Much the same as the Windforce 7970 on offer performs about the same Out The Box as a 680 for £359.99
OC the card yourself and most are aware what's the fastest.
As above the Windforce 7970 is probably going to outperform those two.
Talking about stock 7970's yes, the 670 is quieter and cooler.
PhysX is the only better part of your argument there that Amd is lacking, slight consolation being more vram in Amd's favour.
As has been stated before when Nvidia resort to AMD's tactic of deleting forum posts due to faulty drivers, you know there's a problem.
That's when you can get onto the forum of course, their Facebook page is taking a thumping right now.
Forgeting about the stuttering and no native PCI-E 3.0 from Nvidia v's Amd's zero core problems and 3X(or more)CrossFire issues.
Both teams drivers leaves a lot to be desired tbph.
Pity the article doesn't max out all the games though.
Being a software crippled 6970, then yes, it was AMD's highest end single gpu.
To answer the op, check as much reviews as you can(forget the bias reviews), see what performs best in the games you play and weigh up your options that way.
They are all fantastic performing gpu's when working as advertised and you will be hard pushed to tell the difference in game anyway regardless what you plump for.