Hi everyone, good to be here. I am looking to upgrade my 2007 MacPro, already have taken the first step and ordered a Radeon 5770. I also started toying with the idea of getting an SSD for OS and apps. That was before beginning to learn and finding out I could go beyond Lion on my old machine. Now, of course, I have been bitten by the bug and all I can think is about running Mavericks or Yosemite on it..... In any case, after reading tons of info I was pretty much set on getting an XP941 but it is getting quite hard to get one of theses outside of the US (I live in Spain). The newer SM951, however, are much easier to get but I haven't managed to find out whether it will work on a 1,1. Many thanks.