When I thought about it I must of had the Dunlop Purofort's for at least 4yrs, which is probably why their a bit slippy now the tread has worn, I still wear them over the summer. I must of gone through 5 pairs of the JCB wellies in that time, they tend to split after 6 months.
So I opted for another pair of Purofort, they seemed to be the same price as Bekina (£50) and if they last as long I'll be very happy!