Router recommendation for a small business.

The current setup has 3 Unifi access points providing access to guests and corporate Wi-Fi network on the same flat subnet connected a cisco RV042 no vlan support. I am looking upgrade the router that has vpn, trunking for vlan support. The goal here is to have corporate and guests SSID isolated with these Unifi access points. Budget is less than 300. I would appreciate all your advises. Thanks in advance.