In reply to holmesy: Currently, the best all round climbing crampons (as opposed to general mountaineering ones more suited for Alpine peaks) are probably the Petzl Lynx -
http://www.petzl.com/en/outdoor/ice-climbing-crampons/lynx
However, they are only any use if they fit your boots. So taking your boots shopping with you is a must. If not them, then you have decent alternatives in the Grivel G14 or Black Diamond Cyborg.
All 3 are all rather expensive and you can ice-climb up to an extremely high standard in more traditional mountaineering crampons like the very popular Grivel G12s which you can pick up a fair bit cheaper.
The Needlesport website is as good a place as any to find fairly objective and concise info on most of the options for both mountaineering crampons as well as dedicated climbing crampons -
http://www.needlesports.com/Catalogue/Winter-Climbing-Equipment/Crampons