I have just answer the OP question - which of the mice is the best in term of tracking.
I have all mice menationed expect AM which I should have too btw but its not case right now. anyways, Savu is the only current mouse in the market that in par with the DeathAdder in term of overall performances.
As for my max speed tests I only could reach max speed of 3.7m/s and it tracks flawlessly in it (400dpi, 1000hz,tape fixed), so I cant test anymore than that beacause I cannot move the mouse any faster in the current setup. also its quite hard to make stabled graph when you tape fix the mouse
Zowie EC1 Evo reachs 2.7m/s on 500hz, 2.3m/s on 1000hz (both on 470dpi, not 450dpi as marketed)
CM Spawn and Recon its diffrent story and very subjective - as for spawn I still have it flashed with the 31 Srom ver and gets around 2.07m/s (800dpi, 500hz)
As for Recon I dont really sure yet beacause its stock firmware is basically alittle updated-default so it probably not reach much than 2m/s as far as I know, you guys need to wait for the updated software w/ firmware included so it can be on par with the Spawn's.