I have the rear HyperPro spring - It's not a full shock, just a progressive spring over the OE shock.

I did notice a difference when I fitted it, but, the OE one was way to soft by this time so a new OE one would have felt a whole lot better too I think. For me the HyperPro was a good move, as it was really cheap to add a little better performance.

In your shoes, I'd probably use the Nitron setup, similar to StoicBloke (or at least I think he uses Nitron!)

But then again, the OE shock, despite it's lack of adjustment, hasn't let me down.

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