I have never bought a router fence, but if I had an extra $300 and
didn't need any other tools, I would buy an Incra.
That being said, I did what the others suggested and built my own. I
built the split fence out of Router Magic and it has served me well.
I doubt I spent $50 in material and it was very easy to make. I think
at the time I only had a TS and my router.
I am now working on making a Pat Warner Micro Adjustable fence, and I
have been really taking my time. The major disadvantage of the Router
Magic version and other homemade versions like it is the inability to
fine tune the position, making it more time consuming to use it for
cabinet doors and other precision cuts. I think I spent about $70 to
gather all the material for the Pat Warner fence.
If you really want to buy one, I think any of the fences you mentioned
would work fine from what I hear.