What do you want to do? How fast is your internet? 1Gbps fibre requires something much beefier than 50Mbps.
How many servers do you have going? Are people accessing them from outside?
How many people in your household? Are they gamers and need low latency? Heavy streamers? Working from home needing VPNs?
Without this context just look at a pricelist.
I am looking for a device that can keep up with a gigabit connection
I've been very happy with Ubiquity Edgerouters the last few years. Their ER-X model can do 1Gbps total... So if you're downloading at 500Mbps then you can upload at 500Mbps. It come in about USD 60 I think.
Next level up is the Edgerouter Lite 3. It is much beefier and can easily handle 1Gbps both ways and even faster. It's just under $100. 99 or so. Maybe you can find it on special.
They are really prosumer and definitely much stabler than typical consumer routers. Eg I haven't reset mine in more than 2 years.
It's not open source like mikrotik but they are very hacker and tech use friendly. Most things work via CLI. And most advanced router functions are supported.
I wouldn't recommend the ER-X, it's absurdly slow. Also far too many config items don't exist in the webui and are CLI only.