Pluses for Nikon:
- colour rendition (i love it)
- DX format
- better overall build quality in lower-end cameras

Pluses for Canon:
- clearly, most pros use Canon
- L series lenses

So, overall, i guess this is not a discussion in terms of the camera body, as these keep renewing themselves every year and I might purchase a better model when one comes along. But good lenses last forever, so this is the determinant factor.
But i am still not sure which way to go. It seems to me that Canon has a broader and better variety of lenses, and those L lenses are VERY tempting. Does Nikon offer same quality glass? If so, which lenses should I purchase?
Also, I’ve noticed that some lenses are only compatible with Canon 30D and Digital Rebels. Are the L series lenses compatible with both full-frame cameras (1D, 5D) AND their semi-pro models (30/20D, dRebels)?