I do film, video with FC Pro and some photos with D90.
Like to start and jump on buying a CS 4. But wish one i need to buy?
So many CS 4 products ! Creative Suite design, Premium, Master collection, Production Premium etc..
I believe Extended is what allows you to import Video into Photoshop and create basic 3D objects. So videographers would probably need extended more than anyone else.
It's about $1700, but you get Photoshop Extended, After Effects, Illustrator, SoundBooth, Flash, Premiere Pro, OnLocation, Encore, and Adobe Media Encoder. It's a suite of apps and well worth the cost.
After Effects is a motion graphics/compositing program. If you want to do video, you should learn it. Go to Adobe.com and download the trial of the programs you're interested in. Also, if you're a student, you can get the suite for a greatly reduced cost.