The Fujitsu Siemens Esprimo Mobile U9200 may not be the smallest of models available on the market, but it's still pretty light and demure.
It also doesn't suffer from the traditional performance problems associated with true ultraportables and won't cost an arm and a leg at around £1,000.
Although it only has a footprint measuring 300 by 223 by 37mm, making it just slightly larger than an A4 piece of paper, the U9200 has the performance of a much larger machine. We tested the 2.2GHz Intel Core 2 Duo T7500 processor with a generous 2GB of RAM and it managed to turn in a PCMark05 result of 4,386, which is virtually unheard of in machines this size. Since we tested the machine, the processor has been upgraded to the 2.4GHz Intel Core 2 Duo T7700, which would reflect even more favourably still in the benchmark result.
If you need to use some heavyweight applications on the go, but tend to find you spend much of your time cramped into economy-sized plane seats, then the U9200 should prove an ideal travel companion and at 1.8kg it's light enough not too make too huge a difference to your hand luggage.
It's also a handy machine to have around when there's no Wi-Fi network or mainline Internet connection available as it's got a built in HSDPA card, providing fast Web access over the existing mobile phone network.
Its keyboard is solid to type on and although the keys are a little cramped, you can still bash out large amounts of prose with a little practice.