Rolls-rapide - you might be right about the One coming out in 2005; 2006 was an estimate.
Some of the second generation One models, like the One Performer Mark posted the picture of above, have a toothed belt because they employ a separate motor for the brush-roll. The original 'One', and the later models such as the 'Performer HPer16' etc, have the ordinary Hoover flat belt.
Mark - thanks for posting those pictures; I agree the Infinity has a lovely colour scheme! I see you have an original 'One Performer' - what's that like? Does the 2-motor system work well?