We are getting WAY off topic, but, I will answer your questions. I use Deluxe Paint 3 for creating the graphics and titling that is genlocked over live video. I do have a complete Video Toaster setup, but, I can not drag that out into the field.
The reason why I do not use my Amiga 3000 is because it has a tendency to over-heat. I can leave my Amiga 500 tower on all the time and it never over-heats. The case is slightly larger then an Amiga 3000, but much more durable.