I have always thought GRs were good, and Graham is a top bloke. But, you must remember he makes these coolers in his spare time and there is a bit of a waiting list in weeks for his coolers. The guys at pro alloy really know there stuff and after speaking to them at the shows I may be tempted for the 2nd generation cooler setup, they are proven in all the mags and getting bigger. Oh and they are just down the road from me