Thanks you sir. Just curious tough, the latest iMac sports a fusion drive, would you commit to this single-storage system? Let's say a 1TB fusion drive, is it fast enough for audio production task? How does it compare to separate physical drives, say a 250G-SSD and 500 G 7200rpm disk?
It's not really about speed - I'm sure that either solution would work from that POV. It's much more about redundancy, data security and the flexibility you get from being able to move the data you're actually working on to another machine, for instance, with ease. It only takes one screw-up on a system disk to leave you in all sorts of trouble - and yes it can happen.
The SSD situation is a little more interesting. In theory these have a finite number of read-write cycles available to them, and I'd say that the last thing you need is to have a disk failing on this basis with anything you actually care about on it. Now, I use SSDs quite extensively, but I've adopted the 'redundant' approach. So temp files for the whole DAW have a SSD of their own, as this can get hammered quite hard. But, if it fails, it doesn't matter - just slam another one in. The OS and application files are all on another, which is backed up, and all actual work is stored on external drives, some of which are SSDs and some of which aren't.
So my advice is, however you do it, not to put all your eggs in one basket!