I still think the best value zoom lens for video is the Tokina 28-70 f2.6-2.8. If any of you guys have never heard/used it I really recommend giving it a go. Apart from range and aperture, other good factors include manual aperture ring (nikon mount only), near parfocal, non-rotating or extending front element (good for matte boxes). And although the prices are inflated due to DSLR video trend, it's still good value ($300-$400).
It's been my fastest zoom and workhorse lens.
ed_lee83 got a reaction from PannySVHS in GH2 noise levels are killing me. Could it be defective?