Since I dont want to shell out the cash for a MacPro anymore and would prefer a Quad Core iMac, I have decided to do all of my video encoding on my current 2.53GHz Unibody MBP. I was just curious how bad is it to say encode about 60/75 DVD's twice (I do each movie for two formats in Handbrake). I'm trying to get this done as fast as possible, so my computer is encoding pretty much all day. I know that it would be faster to just let it do that and consume 100% CPU, but it's the only computer I have at the moment, so I need to do other things while it encodes sometimes. So, is it really bad for the computer and its overall lifespan to be straining it this much at once, or is it built for this much strain? Also, please dont suggest a QC Windows box. I like HB in OS X much more. For whatever reason, they come out better in OS X. Trust me, I've toyed with this idea too much.