Sony VAIO Z Review
" Ultrabooks and MacBook Airs are very nice laptops, they are light and have a stylish design. The new Ivy Bridge processors have made them quite a bit faster, but they're still no powerhouses. If you want the power of a quad-core chip, then you need to move up to a larger and heavier laptop. At least that is what you'd expect, but Sony proves otherwise with the Sony VAIO Z. It's a laptop with a quad-core processor that only weighs 1.15 kg. "