Thanks for your advice The Ecologist, Vinux, Link and Dason:
I have downloaded: Linux Mint 11; ubuntu and PCLOS Gnome to try out. Having trouble writing the later, but I have had a day with MINT 11 and so far Im pretty hooked.
I just need to figure out how to install R as it doesn't look overly intuative to newbee. I also need to find out if there are linux based alternatives to Adobe P/S and lightroom, which is all that is holding me back from a full install.
Im impressed with the speed and absence of popup tags and the overall look of it!