Great writeup outlining some of the features you get out of the box. But at the end of the day, this is another RHEL clone. Other clones are mentioned, like CentOS, but there is no clear motive to choose SciLinux over anything else.
I recommended the same thing to my clients for a while last year, CentOS 6 was not getting updates at all for a time. They seem to have fixed that now though, it looks to be safe to use CentOS 6 again. Of course, if you want fast updates, pay RedHat.
