I ended up getting a pair of Creative Aurvana Live! headphones. From reviews online, they seem to be quite large, but small enough to easily move around and wear comfortably whilst using my laptop - I'm mostly going to be just sitting whilst listening to them and not moving about much, hence the need for something that folds up like the PX100, isn't all that important. Regarding the sound, from what I've read they seem to have a warm and spacious sound signature and being closed back, sound leakage should be minimal, which is perfect for my needs.
I was considering the Audio Technica ATH-ES55, which certainly looked cooler and more portable, but cost a fair bit more than the CAL! which probably sound better anyway.
Please tell me I made the right choice! Will post some impressions once I receive them.
Edited by titaniumx3 - 7/13/11 at 4:17pm