I think I'm going to need more than one grinder unless I'm going to change the discs depending on what I need to do. This 8" grinder from Trade Tools however, was my first choice.
I also purchased the Abbott & Ashby's add-on belt sander as this will be very useful working the aluminium edges.
I've mounted this on the workbench but I as don't wish to waste too much space, the next one will have to be on a pedestal of some sort.