Thanks for the info so far.
I am in the UK, so as we dont actually get that much snow, they need to be an all round, wet, mud and snow tyre with most of its use on tarmac
and not to wear out too quick.
I am currently looking at the Vredestein Wintrac 4 extreme, which seem to have good reviews http://www.tyrereviews.co.uk/Tyre/Vredestein/Wintrac-4-Extreme.htm, does anyone have any experience of these?