Speaking of the K-5 family, here is also a latest ISO test for the K-5IIs against the Fuji XE-1:-
It seems the results of the IIs is good enough and it wins hands down the Fuji.
K-5 Mirror "Jumpy" Videos Galaxy
Wednesday, January 23, 2013
K-5 SR Super Demo (YouTube Video)
Image Quality|Issues|K-5|K-5II/s|Other Bodies|Reviews|Shake Reduction|Videos|