Hi Numnumball,
I used to take flower shots with a 90mm Macro lens. Thinking of going for butterfly and dragonfly photography. My colleague recommended Tamron 180mm Micro for it's longer working range and price. But after looking thru' your shots, I am seriously considering this lens. It is not available in Nikon Singapore website, but available in Malaysia website, US and UK. Not sure if a replacement is coming soon. This lens is rated 10 in Fredmiranda's review. Have you got any chance of taking bugs photo with the Tamron 180mm to compare it with Nikon 200mm?
Regards,
ancientmoon