I have a complete LS system with the regular fence (not the wonder fence). I think the LS positioner is a fantastic invention though it was invented by JoinTech. Anyway, I think an MDF fence would be fine. I'd just do it for now and if it doesn't perform, replace it with a hardwood one. You might want to put a T slot track in it for mounting stop blocks. The one disadvantage to that approach is you can't do fence mounted dust collection. Not a problem for me as I do under table collection and it works great. The wonder fence has a DC port if under table doesn't work for you (I didn't see a shroud on your router).
I would probably laminate the face of the MDF fence with a light colored formica or similar so I could make pencil marks to aid alignment of stop blocks.
The only accessories I use on my fence are shop made stop blocks. I dislike the Incra stop as it really is only useful on the left side of the fence. The "repeatable" positioning feature of the stop (and fence) isn't that useful and gets in the way of quickly setting the stop position, IMO.
Measure twice, cut once and CROSS OUT THE WRONG MARKS.
Last edited by PhilBa; 11-23-2015 at 04:10 PM.