I've been running opnsense on a qotom mini pc for a couple years now and have no complaints. It has plenty of resources for my 1gb fiber connection.
Are you currently using a modem/router combo or are they separate units? If it's one unit, you'll need a way to connect your fiber. The qotom has 4 sfp ports that should work for this or you can use a media converter.
The qotom has 5 2.5gb ethernet ports so you might be able to avoid adding on a switch. If you go the route of using a mini pc with dual ethernet, you'll have to add a switch to the mix.
I've been running opnsense on a qotom mini pc for a couple years now and have no complaints. It has plenty of resources for my 1gb fiber connection.
Are you currently using a modem/router combo or are they separate units? If it's one unit, you'll need a way to connect your fiber. The qotom has 4 sfp ports that should work for this or you can use a media converter.
The qotom has 5 2.5gb ethernet ports so you might be able to avoid adding on a switch. If you go the route of using a mini pc with dual ethernet, you'll have to add a switch to the mix.