Thanks for the quick replies. Since my space is confined, I am limited to the single canister option. Based on @lgray's response, I think I will go for the combination sediment/carbon filters. Most of my water usage is via the fresh water tank (no direct connection hookups at the campsites we frequent), and we do bring a separate container for drinking water. My main focus was to avoid forking out the $40 every season for a new filter. The smaller micron filtering and gpm improvements are bonus.
In case anybody wants to comment on usage experience, this is the filter that I'm planning on trying first: