@NBS, do you have pics of your set up?
I just installed XBMC on my lappy and already I can't wait to test it on my Samsung PS50C430 I bought few days ago from Cats. I will be getting my PC end of this month also. I thought of buying Mede8ter, WD, or whatever, but seeing that my pc will be about 3m away from my plasma, I might as well save that R1k and just buy the remote (I like that Compro K300) and a longer HDMI cable.
What cable did you use to connect to your plasma? Do you need a powerful GPU?
I will be buying the Club3D Radeon HD 5670 1GB. I hope it will be enough. I see problems when I want to work on my pc and someone wants to watch some movie since my pc won't be a dedicated HTPC.