At present I am using those inexpensive 5turn pot as shown in this thread. They work Ok but I have already replaced one because it was noisy around "centre".
I reckon they will give me problems in the near future. I have seen those pot from RS: expensive but they will no doubt last a while. I an doing some research into Hall Effect "pots". They might be worth playing around with, but it will require some gearing to get them to work for me.
No I havn't tried "Dirt" or R factor I have been iracing for a couple of years, so I am more or less committed to that. I am also building an F16 flight sim which I intend to motionisze (new word?
) At this stage I intend to use only 1 axis on that sim.