There are some other options - for example the Video Toaster Flyer (only NTSC I think) and Broadcaster32 (the most professional video editing card for Amiga - takes up four (!) Zorro slots...
Personally I own a VLAB Motion, but in an Amiga you can't get very good quality. Too much motion will introduce errors in the video streams at higher quality levels. Then the Draco-version of VLAB Motion is much better since the speed of Draco's bus is much higher than Zorro-II/III.
If you use VLAB motion in an Amiga, make sure to use fast harddrives - preferably U-WIDE SCSI-3 at 10000 rpms. The software (Movieshop) is very neat and powerful. Especially if you link it with other programs such as Monument Designer (titling program).
