If you noticed, Nikon's built quality has ALWAYS surpassed that of Canon's. Just look at its 30D - so plasticky, but of course, they have improved with their latest launches.
My 20 eyars with Nikon was 'coz its built quality and weather sealed. Of course, it would be HEAVY, and if u walk 16 hours a day lugging your equipment, then u will know what I mean.
Each brand has it's strong points and for low light, it is Canon, sports, also Canon. But with the latest offerings from both camps, u would see that the line dividing these are blurring... some sports shooters are shifting camps liaw.... with the new CMOS from Nikon, would the low-light issue be solved/bettered? Let's just see.
It is at times irritating when one goes into the "is Nikon better or Canon better" discussion, just like sports fanatic's "MU vs Arsenal". Just shoot with what you have... For myself, I never liked to discuss my pix and/or other ppl's pix as photography is SO INDIVIDUALISTIC. If YOU feel YOUR pix is nice, then it is nice... period!
IF you ask for C&C (hope everyone know what C&C means), then be ready to accept POSITIVE and NEGATIVE critiques and/or comments. I have seen some only able to take POSITIVE ones, then those fellas should note "only POSITIVE C&C welcomed". If you don't like C&C at all, then please don't end your pix or note with C&C. For others, if you don't see C&C asked, then zip up.
When I get the chance to meet you guys, I can share with you the 'differences' between SG and MY photo forums.
Sorry, a little OT the last few para