Ok, I've used macs for over 20 years. We have an iMac at home and I have a powermac G5 in my business. We are thinking of getting a laptop and upgrading here at home. I do not understand all of the jargon, i.e. ATA drives, bus speed, L2 cache, Boot ROM version, etc, etc. Where can I access a good explanation of all of this so that I can choose wisely? Thanks.