I've owned a Powerbook since early Nov, and really been won over my OS X. As I'm using my PB for everything but games, I've decided to make the break and get an iMac for home. I'll be getting a second hand model (I think) as it will be funded by the sale of my PC. So I think I'll be looking at the 17" model with either 1.8 or 1.6 processors. Superdrive isn't a concern as I'll be getting an external dual layer drive for use with both the PB and iMac. I've got a couple of questions though... How easy is the iMac to upgrade with say a bigger HDD or Airport Extreme? And was there ever a non-widescreen 17" available? Is the gap between the 1.6 and 1.8 siazable as there is a difference in the FSB.... And are there any considerations to make when buying an iMac... what would you want as standard? Cheers!