John
In a word, iMac.  If you are making home movies or mid grade video.

Get a G5 Imac and your have what you need with iMovie, iDVD etc

If you are serious, you can move up to Final Cut Express. If you are
REALLY SERIOUS, then get a G5 dual processor and Final Cut Studio. (
Final Cut Pro, DVD Studio Pro, Motion, Soundtrack Pro, Compressor)

  go to www.apple.com and follow the links to Final Cut pro.

This is how I make my living. Don't waste your time and money on the PC
side.