Maybe this well help you analogize product placement
Top End Pentuim 4 == Corvette
-stunning numbers, not the most expensive, but made of plastic, and for the masses
Dual Top End Athlon == Lotus
-very fast, but spends alot of time in the shop, and doesn't have quite the history or following that Corvette does
Dual 800 G4 == Porsche
-it's fast, but is doesn't have twelve cylinders, prancing horses, or NASCAR acceptance. It quietly does its thing, and once you buy one, you'll never switch back.
New iMac == BMW M3
-Its got some oomph, but is is the entry model speed demon. Dosen't have all the options available, but suitable for many. Has all the design and styling ques just right..
Old iMac == New Beetle
-its cute, does what is advertised, and your sister's pedicure gal got one because it had AOL IM, and matched her new carpets
Your average Dell == Ford Aerostar
-I suppose you could put a big block motor and a six speed in one of these if you wanted to, and haul every peripheral you own in the back. Whatever you do, everybody else in the Target parking lot will be driving the same thing, well, 95% of everybody else
I too was waiting for a tower, but am not disappointed. I still use a 9600. Its got three monitors, 4 SCSI busses, and PCI 100bT, USB, and Firewire, and it runs OSX just fine. Do I want more speed? Yes. Am I upset not to see a G5 enabled hovercraft today? No. Will I be upset if I buy a $3,500 dollar machine and can't get 4 years use out of it? LIVID.