I'm curious if anyone has tried the Seagate 500GB 7200RPM drive (ST9500420AS) In a macbook yet? Mine currently has a 250GB 5400rpm drive which is mostly ok performance, but currently not enough space. I use my macbook for most of my daily computing, but also a whole lot of Aperture / Lightroom / Photoshop CS4 work as well. I currently have 4GB of ram and have pondered upgrading to 6GB but I wonder how much benefit that would REALLY give me. I don't feel like my macbook is slow, but I'm pretty sure having a 7200rpm drive would considerably boost the speed. What are your thoughts?