i currently have a 12 inch 1.33 ibook, which i got in january (knowing full well that new stuff was coming, including the MBP), and i've always been pleased with it. however, i currently have a problem with the power brick, which has bad fraying near the part that hooks into the ibook. the inner wire is clearly visible, and may not be too far away from coming completely off (either the shell or the wire itself). a replacement is $80. coupled with a very much used battery (though i'm still eligible for a free replacement, due to the recall), i'm wondering how much sense it makes to invest in a replacement, or whether i should think about a macbook. a replacement power brick would be a tenth of what i paid for the ibook, which is not an inconsiderable amount. is that crazy, or sensible?