By the way, the long barrel is rented! i´m in the race for a complete new set and big upgrade, and i am still not sure what to buy. About the cam i can be pretty short. That will be a D800 with D4 batterygrip and D4 battery, so i will have 6fps in DX mode (allways handy when shooting an airshow). I still do not know what lens to buy. As i heard the 500F4 is sharper then the 600F4, but that might be just a wild story of course. the 600F4 handles pretty okay, but i found out that the 500F4 handles so much better! For now it probably will be the 500F4, but the 600 still is not out of sight completely. any tips or advices are welcome of course!