Hey guys, I'm about to purchase my first macro lens. I've been doing a lot of research and I think I've narrowed it down to two lenses. I am between the Nikon 105mm 2.8 vr or the Tamron 90mm 2.8 vc. Which do you refer? I know a lot of people swear by the Nikon 105 but I noticed dxomark and a couple other places rate the tamron slightly better.