+1 for Canon.
All the pro's I've worked with have used Canon. My Dad has a Nikon, and compared to my 450D it feels cheap. I think its a 400D equivalent, so a generation out compared to mine but even so, doesn't feel as well made. However, no decernable difference in picture quality to an amatuer like me.
I don't like the shutter sound on the Nikon either. How's that for fussy?!