If you can wait and K5 is not a need, then there will always be something better coming out later. Who knows if there is one body at iso 51000 without any noise later on. Anything is possible with the fast changing technology.
K5 model may be obsolete in a year's time or more.
The K5 has more features to play with, better usable high iso and higher mega pixels. Still its the man behind the camera that dictates the final oupput.
marcus
K5 model may be obsolete in a year's time or more.

The K5 has more features to play with, better usable high iso and higher mega pixels. Still its the man behind the camera that dictates the final oupput.

marcus