so after a short bit of research i decided to go with the K&N pcx air filter.
ordered direct from their .uk site and it arrived next day, was surprised.
fitted it today at work and altho i wasn't expecting a performance improvement (this wasn't the reason i fit one) my bike did seem a little quicker off the mark, and also seemed to struggle less join up the big hill i have to climb each night coming home.
overall so far i am pleased with my investment and it was very easy to instal. just don't drop any screws into the foot well fairings coz they are a real pain to get out
![Thbt :P](./images/smilies/icon_razz.gif)