Horn Antenna Recommendations

I’m interested in to buy some HORN antennas to perform large range test in outdoor environments
like soccer Fields, Electric Power plants, Outdoor Parking zones.

Any recommendation of commercial Horn antenna compatibles with DW1000?
Any Experience that somebody want to talk or Tip or Advice?

We’re using an ETS-Lindgren 3117 which has 10.6dBi gain at channel 5 and 12dBi gain at channel 9. Schwarzbeck BBHA 9120 C might be another one to look at with slightly higher gain.