Assuming its still an Intel Atom, GMA950, etc system inside, I'd go for the bigger disk & the sim slot. I however have not found a way of getting my 3G USB stick to work under OSX & thats the main reason I still have WinXP to boot from on my system (4211). I would dig around & check there is a solution under OSX for the 3G card or accept its like the headphone socket, something you can live without. I have had most success using the MSIWINDOSX86 image to build my "Hackintosh". That definitely fits on a normal DVD & is 10.5.4 saving the upgrade from the Kalyway versions. I found it easily on pirate bay, but it is Intel Atom etc specific, hence my question, as it has had all the other kext's removed. Its easy to build a dual boot system, WinXP needs to be in the first disk partition & OSX the second, I have a third FAT32 partition as both operating systems can see it so I only need to save files once in there. I used puppylinux to carve the disk up, it boots from a USB stick, runs in memory so you don't need to install it & has an easy to use (graphical) disk partition tool. (www.puppylinux.org) There is a good set of instructions on how to use it on the website (with pictures !) in the manual section.