[Elecraft] K3 - getting a sub receiver - filter suggestions + dvr

[Joseph Carter]

Greeting all.
Between my birthday and Christmas my wife has OK'd the purchase of the sub-receiver for my K3 (#6623).
I have read the recommendations by Wayne on the order site and originally thought I would just duplicate the filters in the 
main receiver (2.7, 400, 200) as I do mostly CW and Data but I do enjoy casual  SSB also.
I note form Frank Cady's book that the primary reason for having the filters the same is diversity reception and that do not need to be the same.
Right now finances only allow 2 additional filters.
So I have been giving it some thought - would it be reasonable to put say a 1,0 filter and a 2.1 filter in the sub or perhaps match the 400 and add either a 1.0 or 2.1?
I realize that my operating style influences this - I am not a contester  - just enjoy casual operating and some DX.

The other issue would be adding the DVR - I was thinking of getting it just because it looks like it is easiest to install it at the time of the subreceiver addition though I am not sure how much I would use it and if I don't get it - I can probably add one more filter.

"Found" Elecraft last Spring - now have K3 and KX3 and love them and this reflector.
Thanks es 73
de Joe, W9JC