as the times goes by, the revolution of DSLR still continues
nowdays canon as the market leaders has the big rivals from booth nikon and sony
nikon has managed their new D3s to the level that no one would imagined before
D3s can managed their noise till 25600 with a stunning result
otherwise sony with their alpha 900 and alpha 850 can bring you such a great detail
from fullframe sensor with an economics prise.
and then canon with their 1D mk IV should struggle for fight the D3s, but i thinks their equal.
and the most promising camera today should be 5D mk II with stunning result in both low or hogh ISO and then the low price make it even better as bonus we can shoot video with full frame sensor and narrow depth of field that i never expected before.

what a wonderful era for digital photograpy today..
have a good shoot then mate..