I just purchased the 24-200mm Tokina full frame zoom with Nikon mount and a Nikon E mount adapter for under $100 on ebay . So far I like it since the VG900 is so great in low light I could even use the 200mm FL in low light ( indoors on a rainy day ) with the aperture ring set to F8 that might be closer to F13 @200mm.
Tokina 24-200mm f3.5-5.6 - a set on Flickr Tokina AT-X 24-200mm f/3,5-5,6 - a set on Flickr http://www.flickr.com/search/?q=24-200mm+Tokina&s=int
I also purchased the Sony SEL2870 FE 28-70mm F3.5-5.6 OSS on ebay for $335 and the AF along with the OSS works great with my VG900 and looks like it was made for that size lens and the balance is perfect.