I am purchasing the Hauppauge HD-PVR, to which I am going to use to record HD gameplay from my PS3 and edit via iMovie, to put videos on YouTube and whatnot. Now my Macbookis 1.5 years old .. it's an Intel C2D 2.16 GHz with 3GB of usable RAM .. but the only limitation I see is the weak graphics card -- only 64mb. Whenever I watch HD videos on YouTube or other sites my computer gets load and my CPU starts getting pretty busy. So my question is what can I do so that when I am editing HD videos and playing them back and back to view the edits my experience is as smooth as possible? Does the 3Gb of regular RAM help at all? Do I have to close all my other applications, widgets, etc and only have iMovie open? I've edited high-quality SD video in iMovie that I captured via an EyeTV 250 Plus, but not HD. THANKS!