I'm having a mind-debate between keeping my 1DMKII & 1Ds or selling both for a 50D and 5DMKII. I was just on a serious photography trip and most of big-time pros (NG Shooters) didn't use a tripod and were using shorter glass. They were taking advantage of high ISO and cropping to not have to carry as much equipment. These guys were all about 1 camera and 2 lenses - nothing else in the field.
I can't imagine giving up my tripod because I like to shoot creatively with slower shutter speeds, but I do like the idea of being more portable.
Here's what I'm thinking:
1D Pros:
- 1. Autofocus is incredible
2. Machine gun shooting (1D)
3. Surreal image output of 1Ds
Cons:
- 1. Weight and size
2. Weight and size of batteries plus big charger
50D/5D pros over 1D Series:
- 1. Smaller and lighter including batteries
2. Better High ISO performance
3. Many more megapixels
4. Dust cleaning system
5. Liveview (useful for holing camera low or overhead)
6. Movie recording on 5DMKII
I shoot wildlife, sports, and landscapes primarily. I also try to travel as often as possible and am tired of carrying 40lbs of gear on my back.
Autofocus and ripping over 8 shots in a second mean a lot to me. Is the trade-off from these two things worth it?

