Toshiba's Portégé R500 was a breathtaking ultraportable notebook, and one of the highlights of 2007. The R500 was exceptionally light, but suffered from lacklustre battery life and suspect build quality in places. The Portégé R600, which updates the earlier machine to the Centrino 2 platform, comes in several variants with prices ranging from £1,099 to £1,699 (ex. VAT). Is the R600 still a head-turner, and does it address the issues with the R500?