Was playing with a D700 and was surprised that its size wasn't that different to my d300s, size being my main reason against going fx (and cost obviously). So that set me planning / daydreaming about future nikon purchases. (Please humour me here (shun!), this is a case of imagined / future want, definitely not yet in the 'need' category). Not being that aware of fx normal zooms available i've spent a while browsing the lenses available, and found the tamron 28-75 2.8. half the weight and a third of the cost of the nikon 24-70 2.8 and seemingly a very well regarded lens. Current kit is d300s with tamron 17-50vc. In my imagined, wealthy near future i have 2 directions. Upgrade the glass to 17-55 nikon, cost approx £600 + my lens; or upgrade body to D700, cost of approx £750 plus my d300s. I also note thet the d700 + 28-75 is lighter than a d300s and 17-55, and only slightly heavier than the d300s+17-50vc. So what direction would you go if you were in my imagined situation. Just chewing the cud..