Non-Realtek NIC Recommendations

Since switching to Proxmox I've noticed an issue with intermittent network connectivity on my VMs. I've narrowed it down to the realtek based PCI NIC (Rosewill RNG-407-Dualv2) I currently have installed. Basically when I see a ton of these in my syslog:

Dec 14 13:55:37 server kernel: r8169 0000:09:00.0 enp9s0: rtl_rxtx_empty_cond == 0 (loop: 42, delay: 100).

It means it's time to reboot. I did some digging on it and it appears to be a kernel driver issue. Unless someone in this community has encountered this and knows of a good fix (other than rebooting) I'd rather just ditch Realtek and replace the NIC.

Can anyone recommend a 2 port PCIe (x1) card that has good driver support under Linux and (hopefully) won't cost me a small fortune? Bonus points if it's 2.5GbE capable.