Quote:
Originally Posted by
labelexec 
Is there a big performance difference between 2.8 vs 3.0 and between 3.0 vs. 3.2.
Supposing that the only difference between the 3.2 and 2.8 GHz chips is sheer clock speed -- no architectural differences, no difference in cache sizes -- the 3.2 is 14% faster than the 2.8 for any task that's purely bound to CPU speed (and the 3.0 is 7% faster, of course).
Anything you do that has elements of disk I/O speed, bus speed, RAM speed, etc. -- i.e. most things you probably do -- won't see all of that 14% increase. Only a solid set of benchmarks will tell you how much for what tasks.
I really, really do like to buy the top-of-the-line models Apple makes. I'm typing this right now on my once top-of-the-line Quad G5. But I have to admit my craving for speed is not at all justified by any real-life business justification, or even any hobbyist uses that push my computer very hard. I just like nice toys.

But even though I like to spoil myself, in this case I just couldn't see spending the extra $1600, or even $800 dollars. I settled for the basic 8x2.8, with an extra optical drive, the NVIDIA GeForce 8800 (which sadly bumps my shipping time from 3-5 days up to 3-5 weeks -- I keep thinking about canceling my order and changing that!), and a 500GB hard drive instead of 320GB. I'll add an additional 4GB of RAM myself at a much more reasonable price than Apple's price.