I buy my much coveted 70-200 VRII next week. Then I see this Sigma beast! The focal length of the Sigma suits what I do but the Nikon could be better in closer shots and much smaller. My question is can anyone justify getting both or is it just insane. I know the Nikon holds it's value over time, how does the Sigma gear go? Pretend money is not an issue - what would you do?