I just bought a Sharp m4000 and am very happy with it so far. It does have some problems. The keyboard feels flimsy and the touchpad buttons are too small and are not the most comfortable to use. It doesn't have a scroll button and the scroll mechanism doesn't always work perfectly - in fact, I have been unable as of yet to get it to work with Firefox, which is very annoying. As with most ultraportables, the speakers stink. However, it has an absolutely amazing screen - incredibly bright and high resolution, and a nice 13.3 inches, unlike most 12 inch ultraportables. This really eases eyestrain. The keyboard, while it feels flimsy, is comfortable to type on, and the battery life is excellent. If you don't need super gaming processing power, I think it's a good choice, especially considering how much screen and battery life you get for the light weight. If you haven't already, you may also want to take a look at the Fujitsu s6000 series, which are better designed machines in many ways but with different compromises.
Please help! I need to purchase a small, VERY lightweight laptop with a long battery life & a great screen for PowerPoint presentations. Which is best -- the Dell X1, Sony TX670, or the Sharp M4000? The Dell & Sony are VERY pricy and non-upgradable, so if I get them, I'll have to keep them for quite some time. The price of the Sharp would allow me to get something else in 18 months when something new & remarkable comes on the market. I'll appreciate your advice! Thanks.