Hi--long time lurker, first time poster. I finally got my cMP, and right now I'm running the OS and applications from a SATA III SSD on a 256GB Apricorn PCIe card. I want to put everything onto a single SSD, and I'm trying to decide between a SATA III SSD or a PCIe AHCI card. I don't do any heavy lifting, it's mostly text creation and editing, email, websurfing, and listening to audio/watching video. The heaviest stuff I do is occasional light amateur audio/graphics/video editing (last video editing was years ago). So what I'm really looking for is snappy OS/UI response--I want windows to pop up when I click on them, fully populated, and apps to start ASAP. I just don't know if paying 2X the bucks (or more!) for a PCIe AHCI card makes any sense. So if you've ever shifted from a SATA III SSD via a PCIe card to a AHCI PCIe card, what was your experience? I know the AHCI PCIe card makes a huge difference if you're doing heavy video editing, etc., but how about in just normal interaction with the OS, apps and files? Is there any real difference? Thanks!