I'm in the market for a new router. The device would be used as a router/firewall to connect three different network (Vlans) to a WAN. 

The networks consist of a private LAN, a Point-Of-Sale system, a public wifi lan with three hotspots (each configured as bridge).

I presume I would need a system with following features: minimum of 4 UTP ports, Vlan support to separate the three networks and the WAN, sufficient firewall throughput.

Any suggestions on a reasonably priced device?