回复：绝对菜鸟问题： Canon Rebel XSi or Canon 40D or Nikon?

I’m Nikon fan, but unfortunately I switched my Nikon D200 to Canon 5D last year (I still have Nikon gear), Nikon is much better than Canon in terms of camera build quality, but image quality are not that impressive( before D3), canon has lots of lens selection (cheaper than Nikon) if you want to upgrade and is always available when you want it, start with canon 40D or 5D or even Mark IIIs may be a good choice and it won’t go wrong if you choose Nikon D3, BTW, I also work in medical field (clinic), I don’t think you want to start with a xsi or xti with kit lens