[Kenwood] Filter selection in TS 850

[Mike and Alicia Fanning]

I'd like to solicit opinions on how to make the best use of the three
available filter slots in the TS 850.  My interest is in CW contesting and
DXing, but I have never owned a SSB filter in my life.  Seems like the 1/2
punch of 500/250 Hz makes sense for CW, but which IF should the narrow
filter be installed in?  What would be the best combination for CW only and
for CW as the primary mode with one SSB filter?

Thanks,
-Mike, K4GU