Operating system (Windows/OSX) doesnt matter. I at least 4hrs battery life I'd like USB 3.0 (I mean... it's 2010) I'd like an eSata port I don't need firewire 800 HDMI would be nice, but is not a deal breaker Nvidia optimus or some other graphic card auto-switching (or manual switching) technology is preferred durable build quality without being too too bulky. Core i5 or core i7(dual, not quad core) chips should be the base platform here. it must be able to handle up to 8gb...