Robbie,
The S1 rads were the best as they have proper brass top and bottom tanks, not the horrible plastic ones on later models
My 2004 developed a tiny weep from the drain tap boss, which was professionally soldered for about £40 inc a pressure test and repaint
It was still perfect when I reluctantly sold the car at 50k miles earlier this year, so if you're handy with the spanners I personally would stick with the original
There are some advantages to the Alloy replacements, mainly for the plastic topped versions, but an S1 for road use is fine on the original rad
