I've been testing my new setup rMBP with Logic Pro and multi-track drum editing, so I did some testing. Editing on the usb2.0 or fw800 was just awful, even play/stop response is vomit-inducing slow. Internal drive isn't all that big, but I copied the project over and tried it there. Transient analysis, overall response much better. 450mb/s. I then wondered if I would benefit from a faster drive... Meaning cMBP dual SSD raid0 setup for even more snapiness. So I created an 8GB RAMDrive and tested it real-life. The SSD jump from FW800/USB2.0 or even internal Raid0 HDD (tested on my cMBP) means instead of waiting 10secs for enabling/disabling quantization track to 1sec. Using RAMDrive instead of SSD means waiting 0.5sec, and project doesn't load any faster. (its already instant with single SSD) That leads me to believe I actually benefit more from random access time than actual bandwidth in practice when working with my projects. Also actual bandwidth used isn't more than 2-6 MB/s. As far as I know random access times go haywire when doing an SSD RAID0... In this particular case, would I see worse performance going RAID0? (>> no buyers remorse if true) Also, I'm waiting patiently for this: https://thunderbolttechnology.net/product/delock-pa121542513 Can I hope to get the same Random Access Times as from internal sata? I didn't know all this when I ordered, otherwise I'm pretty happy with my retina. Thanks. btw, if someone wants I can upload a simple RamDrive script I whipped together.