The new X-series Walkman is Sony's first stab at a proper multimedia portable device to rival Apple's iPod Touch
Majors on portability and competitively priced, but not so hot when it comes to pure performance
The Holy Grail of MP4 video portables
Versatile with a list of impressive specs as long as your arm – but not a doddle to use
Slimmed down but beefed up on specs and quality