Well ... I can tell you that Pi 2 + Arch rocks !! Runs very very fast compared with the normal Pi.
Also very nice to see all CPU-cores working to get things done.
I am now compiling FPC and Lazarus (Pascal RAD IDE), while at the same time running headless a vnc server and browsing the internet with FireFox. No problems at all !!
And running a cloud server like 'OwnCloud' is now a breeze !!