We'd be tempted to file this system in the consumer ultraportable category, since it has a 1.4GHz Core 2 Solo processor and a thin form factor (just 0.63-0.98"), but the panel size makes it, well, not all that portable. MSI says the system has a width of 15.4" and a depth of 10.04", which actually sounds a bit bulky.
Still, aside from the low-power single-core processor, the X600 looks relatively well-endowed. MSI includes 4GB of RAM, Mobility Radeon HD 4330 512MB graphics with HDMI output, 320GB of mechanical storage, 802.11n, Bluetooth, a six-cell battery, and Vista Home Premium. That hardware adds up to a weight of 5.5 lbs, which presumably doesn't include the external optical drive MSI throws in the package.
One design decision does puzzle us, though: the paltry 1366x768 display resolution, which is exactly what you get on those teeny 11.6" ultraportables, not to mention MSI's own 13.4" X340. The larger panel might make movie-watching more enjoyable, but not everybody may want to deal with a larger notebook without more pixels to sweeten the pot.