99% of the people probably don't know the difference between the gray market stuff. Not saying you'll get wack gear... but in cases like this its good peace of mind for a few extra bucks.
I checked and it looks like good feedback to me, 99% positive. The few negative ones all seemed to be no USA buyers (nothing against them). I'm surprised to hear the comment about the lenses. I find that the Nikon 55-200VR is a fairly good lens, not the fastest in the world, but fairly good.