I had another try at finally getting a proper HDR, still not quite satisfied with the results but I think I'm getting there. This is the view from Zurich from the Waid.
I changed my workflow from using the RAWs straight out of cam to "developing" the RAWs in DPP and exporting into a tiff file. Those were then used with Photomatix and I am very happy with the results compared to my previous workflow; much less noise and better sharpness, though there are still some slight ghosting artefacts on the leaves.
Any C+C is greatly appreciated, I feel I really need some help to get this HDR thing right.