OK, I have become fairly addicted to photography and need some advice on what I am missing from my kit. I shoot mainly cars, wildlife, sports, and landscapes.

Canon 7D w/ 28-135 USM IS

Canon 70-200 F2.8L IS
Canon 17-55 F.28L
Canon 50 1.8 (great cheap prime)
Sigma 10-20 F3.5
Sigma 30 F1.4

Manfrotto 190CXPRO3 Tripod
Really Right Stiff Ball head

3 Canon 580EX II's

Is there anything really big that I am missing from my kit?

 

Yea, a Nikon D3S.

 

I shot Nikon for 35mm but switched to Canon for digital. The D3s is a sweet body though.