Wants vs needs
After Apple introduced the G5 last year, I've visited the Apple Store several times (7-8) to spend 10-20 minutes on each G5 model. I am currently on an 800 mHz G3 iBook; needless to say I am speechless at the G5's performance. I have also tried going from the 'lowest' G5 to the highest G4-based iMac & PB. There's no question about it: why spend money on a system with an old chip? I was told a long time ago by my parents, "never go back, even to get greater impulse." True I am on a G3-based machine; and what I use it for it's adequate. I *DO* however, want to get into making 'archival' copies of my DVDs, and higher-level digital photography, learn Photoshop, etc. This cannot be done effectively with a G3, and the G4 is reaching the end of its power for these tasks.
I have put my order in, and cancelled a G5 system twice already, all because of trying to justify the cost involved. I recently took vacation in San Francisco, and the iBook was a great traveling companion. Fired it up in flight on the Atlanta-San Francisco leg. After every day of shooting about a hundred digital pictures with my new Canon Powershot G5, I uploaded the pictures to the iBook. But after I got back, I noticed that iPhoto is *very* slow.
That being said, I'd love a 15" or 17" PB, albeit with a G4 as my sputnik, and know that at home I have a G5 with a 20" Cinema display. I may not be a scientist, graphic design artist, whatever...I crave the power. Some may cringe saying, "that's a waste of money for that sucker who's not a 'professional' to buy a G5, he's depleting the world of G5 for someone who ACTUALLY needs one."
iMacs are good, but why buy one if it uses 'older' technology? I will keep with my reasoning and when the G6's, G7's, and G8's are released, I will say the same about the previous models.
Today's technology is tomorrow's trash-heap.