Thanks for reminding me about the 4500 'incident' Dylan. The counselling was expensive, but worth it - and now i'll book myself in for a few more sessions, thank you very much..
As for the Lab4 PC versions, for the extra i would always go for the ones with Powerlink as you can always utilise them in the house if you ever fancy a change or feel they are too much for your computer. Soundwise, i'm not overawed by the 4's.. I think the CX100's are incredible, and even the CX50's are good, especially for the price they are now.
I bought a pair of Lab4 PC's from a closed down dealer earlier this year, and have them at the BeoWorld Office for when i take the Mac down there, and although they do sound good i think they are too much for a PC. I tend not to be able to concentrate as much when i have music on, my mind drifts into the tune and i become useless!
Henry - you can audition any speaker at any time at the shop - i usually have the full range there, and it's always great to see a BeoWorlder - even if the phone rings non-stop all day in the background!
Lee
BeoWorld - Everything Bang & Olufsen