yeh i bought one of those halfords ones more for the box than the tools. have already broken all 3 ratchets and extentions and half of the sockets . cheap tat!
this one looks ok to, for a larger box (5 drawer) with wheels...50 http://www.argos.co.uk/static/Product/partNumber/7001129/Trail/searchtext>TOOLBOX.htm or 13-drawer for 90 http://www.argos.co.uk/static/Product/partNumber/7070583/Trail/searchtext>TOOLBOX.htm
personally i would go to halfords or machine mart for a tool box and or roll cab as the argos ones arent/dont seem very big. The ones at machine mart are welll built and are fairly cheap for what they are. So are halfords tbh. Entirely up to you tho.