I have owned an early 08 2.8Ghz 8-Core Mac Pro for nearly 2 years now. I have upgraded it with a 3rd HDD and 8 gigs of ram and everything has been smooth as silk. I use it primarily for audio production. Pro Tools tracking and mixing often using lots of plug-ins. The only real concern I have had with this machine is that it's not portable. I know that it is an absolute powerhouse desktop but I have at times really been put out by not being able to transport my sessions to another location for work. My question is if anyone has replaced a desktop machine similar to mine with a top-of-the-line Macbook Pro? Would I get the same performance experience I had been getting with the desktop? I often think that I'm only using a small fraction of the Mac Pro's power when working with audio. Anyway I'd love to hear some thoughts of current laptop users or desktop users. Cheers. P.S I have posted this both in the Mac Pro section and the Macbook Pro section.