High speed filter pressure is about 10 PSI without solar and 14 PSI with solar.

But I don't understand what you are trying to say here:
and to get my system to run well the system pressure doesn't want to be too high.
Cartridge and DE filters have about the same head loss independent of filter size. Only sand filters, because of the small area, have a head loss dependency on size.

Also when sizing a filter, you really should use the APSP-15 specs and don't worry too much about pressure. APSP-15 specifications use a rate of 0.375 GPM/sqft for cartridge filters.