Recently I bought the DB-10 with EL-EN4a battery and charger for reasons of speed and battery life and I find this modular system nearly perfect and it pleases me much better than D3.
pros:
- If you need the speed and battery life or vertical shutter, I mount my DB-10.
- If I want a relative small, not striking camera I take the DB-10 off...
- PUFlash
- Sensor cleaning
- Even more battery power to use than D3 while you can leave your EN-EL3 inside with DB10 mounted
- I realize that the D700 with DB-10 is bigger and even more heavy than the D3 alone, but I have options...
- No double card slot
- No 100% view coverage
- No pro weather sealing, even though *very* good...
Just my thoughts...