My Christmas gift "from Me to Me" showed up early this year...
I found a pristine condition Nikkor 105mm Macro 2.8G for $650 in a pawn shop in Maui and while I made it back home, I won an auction on ebay for a new Nikkor 14-24 2.8G Ultra Wide for $1550; which is a steal considering the new price tag of 2k.
Considering that I will be getting $500 for my old Nikkor 105mm 2.8D and I got $675 for my Nikkor DX 12-24mm 4G, it makes a good upgrade for a decent price.
Not sure there's any optical gains to have to upgrade from the D version to the G, but the speed of the autofocus alone is worth the $150 its gonna cost me to upgrade. And the 14-24 is day and night compared to the 12-24 DX lens so i'm not worried here.
My next purchase was supposed to be a 300mm that will fit my 2X teleconverter, but finding those kick ass deals forced me to postpone this purchase.