Camera Labs has posted a rather definitive post about the EOS 60D and the Nikon D7000. The Nikon beat out the Canon by 14 points in DxOMark sensor ratings, and the Pentax K-5 hammered it be 16 points. The studio scene at DPReview hinted that the Nikon and Pentax were better, but Camera Labs really drives home how extensively the Nikon beats the Canon. Differences below ISO 3200 are small but visible, but above that, the Nikon is over a stop better. It's very impressive. This, combined with Nikon developing lenses much faster than Canon, makes me feel that if you haven't bought into a system yet, go for Nikon.
Nikon D7000 High ISO JPEG Noise preview