I think either is better than the standard router software.
I've only run pfSense but OPNSense looks like a simpler interface.
Discussion
After spending the last couple of weeks at work testing various standard residential grade routers and troubleshooting weird issues with them I would definitely agree that anything is better.. I haven’t tried OPNSense myself either but I’ve seen it recommended over pfSense recently. General functionality is probably pretty similar with both.
I was I interested to look a bit more at how they do compare so I ran up an instance of each in a VM. The installation process is pretty similar for both of them. These screenshots should give an idea of the difference in the interface. OPNsense looks a bit nicer. 
Thanks a lot, I’m trying to upgrade the home network. I really appreciate it.
I’m waiting for the hardware now