hi im new to macs and am looking to purchase my 1st one(making "the switch")...im getting into video editing and mac just seems to be the platform...the deal im looking @ is a 4 month old G4 1g dual processor with a 22 monitor for 4300...is this a good deal??comes with an Nvidia card 1.5 SDram 80g hd applecare fcp3 etc....i know that apple has a newer gen out that is DDR and L3 cache...is the newer architecture that much better?? or is the past generation nearly as good and im getting a good deal...thanks for any advice