MSI this morning claimed a further foothold in ultraportable PCs by providing early details of two larger X-Slim notebooks. The 14-inch X400 and 15-inch X600 are meant to improve not only on the 13-inch X340 but to offer a still-larger alternative to systems like the MacBook Air; despite their sizes, both are less than an inch thick and weigh far less than other systems in their class at 3.3 poun
