There are a lot of good fans for DG-87... If EVGA fans are OK they could stay but if I need to choose custom fans I will check first with software...
Depend what is better 3pin or 4pin fans...
Noiseblocker Blacksilent Pro 140mm PK-3 1700RPM 3pin
Noiseblocker Blacksilent Pro 140mm PK-PS 1500RPM 4pin is probably great option.
They fit best with case.
Here is Noctua Redux 140mm 1500RPM