Surely A Large Human
Date registered: Jun 2006
Vehicle: '08 C219
Location: Between Earth and Mars
Mentioned: 2 Post(s)
Quoted: 482 Post(s)
^ I was the same way with Nikon. I had a 24-120mm Nikkor zoom, and a 70-300mm Nikkor zoom, and I didn't want to buy new glass. What I really wanted was a faster frame rate, so I waited for the D200 and bought it about 2 years ago. I'd go for the D300 today if I had the choice. Woof.
The image sensor is the same, so it basically boils down to how experienced you are as a photog and what kinds of features you want on-the-body versus traversing menus to set. The D200 lets me easily adjust all the really common things without using the menus, which is handy for doing stuff at a live action event (such as a race).
I've not shot any of the lenses you're mentioning. I love Nikon personally. Tons of pros shooting sporting events chose Canon, but I'm convinced it's because of the lenses. They're also shooting the very high-end bodies and they don't pay for them. Pro's at those events who buy their own stuff almost always chose Nikon...same with the guys who don't need that gigantic ass bazooka zoom lens you always see at golf tournaments and races, because Nikon doesn't make one similar.
I'd go to photo.net and peek around there...you'll find some objective reviews of those cameras and it should give you a good idea what would work best for you. Not knowing what you like to shoot most, I can't recommend a body/lens combo. The two lenses I mentioned have me pretty well covered for most any situation.