This was mooted by a friend of mine as we discussed cameras and the such like. To give this question more structure I'll outline the position I'm in to provide a more focused answer. I currently have a D5000 which I want to upgrade, I'm looking at a D90 or one of Nikons new line of cameras this year or pick up a cheap D700 in the Summer. My lenses are Tamron 70-300 and 18-54 Nikkor AF-S (Which is great by the way). I've also ordered a 200 - 400 VR AF-S F4, which I'm really excited about. This has sparked the question, I'm looking at either a new camera or a 70-200 Nikkor lense. I'm looking to do lots of sports photography, and wildlife. So its got to be some fast and snappy. This therefore begs the question. Is it camera or is it glass?