I think you really need to think thru the issue of using the G lenses in the first place. I haven't followed the development of the Nikon G lenses but the ones I've seen seems to be consumer grade lenses. I you are doing weddings and other pro jobs, you need to look into pro F2.8 lenses. The F2.8 lenses will focus faster especially in dim light. I am a long time N90s user but if I am looking for an upgrade I'd look at the F100. Of course, I'm kinda surprised that you're not looking at digital for weddings. That seems to be the direction most wedding pros are going.