I currently shoot weddings with D700 and D300. Something came up and I really have a need for 1080p video for work in April and a few other later in the year. I have been waiting for the D700 replacement but based on recent rumors that seems to be announced in the summer and with a possible ship/availability date some time in the fall. Given that, I'm considering getting a D3100 to replace the D300 so I can do both stills and videos since it's really cheap.
Anybody has first hand experience and can comment on the low light/high ISO performance on D3100 vs D300. Thanks in advance.