The test team at Dpreview has posted a detailled review of the Canon 5D Mark II:
“The 5D Mark II offers similar resolution to the Alpha 900, increases the sensitivity range to ISO 25,600, and offers high ISO/noise performance that gets close to the Nikon D700/D3. In short it – almost – offers the best of both worlds without costing the earth.
So while the 5D Mark II would never be mistaken as a camera aimed at sports or action photographers (thanks to its rather pedestrian AF performance and overall shooting performance), it balances resolution and high ISO performance very well.”
But read the full review yourself here..