The best DE filter is the Pentair Nautilus stainless steel filters, they're pricey.
The second best is the DEL by Jandy and FNS series by Pentair.
For filtering purposes they're all equal, it's the tank that separates the stainless from the fiberglass or composites.
FWIW, on my pool I have 2 FNS 60's and 1 DEL 60 filters.
It's a very large swimming pool and uses 3 equipment sets to circulate it because of the amount of water.

See ya,
Kelly