I would like to purchase a MacBook Air, i7 8/256, a 27 inch thunderbolt monitor, and an fire wire external hard drive, I plan on this computer being dual use, both fixed on the desktop with the Tbolt monitor and as portable device for use on the road. I would like to make the external drive the start up drive. That's pretty simple to do. I also want to leave the os on the MBA so that when not hooked up to the external hd it will self boot. Will this work.? I also want to make a partition on both the internal hd and the external hd and add windows either 7 or 8 to use with boot camp. What do you all think will this work and if not why not.