Ive picked up a HP NC360T Dual Gigabit Ethernet PCI-E x4. This card works out of the box with Apples Stock kexts no need to install any Kexts such as IntelMausiEthernet.kext.
If you’re looking for a card that works out of box without any Kexts installs then id recommend this card. I have noticed a lot of difference in speed from transferring files too and from the NAS. This is a great upgrade from my Realtek RTL8111E. Ive been wanting to upgrade from my Realtek RTL8111E PCI-E Card only because when transferring high amounts of data over the network it moves all the work to the CPU.