Toshiba Tecra A4

We're set for a confusing time, since few Sonoma laptops will have all of the new platform's features. Most, like the Tecra A4, will mix both old and new technologies.

Intel's new 1.86GHz Pentium M 750 processor powers this top model, using a 533MHz FSB. But the memory will be 512MB of PC2700 DDR SDRAM, running at 333MHz. Performance is still satisfyingly strong, though, even in our pre-production sample, with a benchmark score of 1.75.

Instead of a boxy standard display, the A4 has a 15.4in widescreen TFT. The first resolution offered will be 1,280 x 768 pixels, with higher resolutions and glossy CSV (Clear SuperView) to follow. We saw a pin-sharp 1,680 x 1,050 panel. Screen strength and protection is disappointing, however, and the lid lacks rigidity, so care will be required when on the move. The display will be driven by a 64MB ATi Mobility Radeon X300, giving better 3D performance than Intel's integrated graphics.

Good design elements are evident, starting with the keyboard. Toshiba has eliminated the off-centre feel of many widescreen laptops by moving the keyboard to the right. The principle keys are thus closer to the middle of the chassis. Port placement is good too, with side-mounted D-SUB and USB ports, and a volume thumbwheel on the front. Sadly, the A4 bypasses Sonoma's 802.11a/b/g wireless option in favour of b/g, but you do get an Express Card and a Type II PC Card slot.

It remains to be seen whether Sonoma's power-saving tricks will overcome faster performance to give better battery life. The Tecra A4 hasn't made a step forward yet, although ours didn't have the final software build. With an intensive test lasting only one hour, 18 minutes and a light-use test two hours, 38 minutes, it currently struggles to match pre-Sonoma Centrino.

The Tecra A4 has a lot going for it, including a generous 80GB hard disk, but we'll keep an eye on battery life and screen assembly when retail units arrive. Still, with £1,099 estimated for the top spec, it isn't too expensive, and the range will start at about £799 for a basic Celeron M model.