Any of these should be fine. The think I do not like about Belkin is that I have never seen a firmware update for any of their routers.
So go with what you need in the next year,, since by then prices will have dropped and new options will be needed that may not be available now.
A lot of features are never used, and scan/ repair may be totally useless in your environment, so do not be fulled by the extras.
I hope this helps !