Another DE filter .... ?
If not dealing with DE is on your wish list, then you can probably go down to a cartridge filter and still not notice a difference in performance. The only caveat is that, for most filter decisions, the biggest one you can afford is best. This is especially true for a cart filter since you want to have to open it up and clean as few times in a given year or season as is practical.
I love my Pentair QuadDE-100 because I've gotten to the point where I only need to tear it down twice per year and clean it out. I do not have to backwash it at all. So two tear-downs per year means going through two 10-lb bags of DE per year, that's it.