Ok I'm thinking of getting my first mac. I was looking at powermacs and imacs. An imac g3 has a 600 mhz processer. A powermac has a 400 mhz processer and is a g4. Which one is faster? Isa power mac an old computer will it work fine for simple video editing in imovie? Are the g4 macs slow any issues. Thanks Does anyone have an apple studio display ( Do you they look good do you recomend one.