I would recommend a Gigabit router with multicast support for OSC communication between two computers. You could simply pick-up a gaming router, that would work fine. Also, the UI / settings menu is friendlier on those devices than the pro devices that I use in the field.
A Netgear router is a great option for example that can be picked up without breaking the bank. Just make sure that you are on the medium/high-end regarding prizing to get proper support for high bandwidth / multicast support / vLANs.
Pro devices that I personally use;
https://eu.store.ui.com/produc... with an dedicated WiFI access point