Quote:
Portability and battery life are the most important features for me.

Based on this statement, the iBook would be your choice. The iBooks are generally known to have better battery life than the Powerbooks for a given size.

However, when I made this same decision (chronicled in this forum about a year ago) the thing that tipped the balance for me was not battery life, portability, or processor power, but limited display resolution. The 12" and1 4" iBooks only go up to 1024 x 768 resolution, whereas the 15" Powerbook (which I ended up going with) goes up to 1280 x 854.

In terms of the Powerbook battery life, with moderate use, I typically get 2-2.5 hours. If I'm pegging the CPU and actively using it the whole time, that can go down to 1-1.5 hours. Results vary, but I don't think you'll see 3-4 hour battery life from a Powerbook.

If you do decide to go the Powerbook route, I'm selling one. My EBay auction fell through (deadbeat buyer) so I'm offering mine for $1,100 plus shipping.
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- Tony C
my empeg stuff