Those following the buy & sell threads will know I sold my s2 Pro; some have asked why i'm changing. These are my opinions only. The S2 Pro is a fantastic camera so I'm really sad to part with it.
 I don't have a significant investment in nikon glass (300 f/4+TCs were my big expenditure, my sb-26 is falling apart and in need of replacement)
 2nd generation IS can damp mirror vibrations. No committment by Nikon to release VR in telephotos yet.
 Electronic mirror lockup available to amateur bodies (Nikon only the top of the line will have)
Plenty of other pluses and minuses, but its the above 3 that were important.
1/90 f/6.7 ISO 400 (+0.5 EV)
EFL= 672mm (edited, my maths no good)
Jpeg fine, sharpness/colour/etc all normal defaults
No photoshop, straight out of camera
Looks just as good as my S2 Pro (whew!) Contrast a bit less punchy but thats fine.