For your setup you will still want to get a router. Our Layer 3 switches do not do NATing or have any kind of firewall, so you probably would want something else in front of this on the edge of your network.
With a layer 3 switch it is possible to buy a router that doesn't do VLANs and still make it work. The RV series of routers would work well for this. All of them except for the RV016, RV042, and RV082 are VLAN capable. Even with those three you could set it up, it would just be a slightly different setup.
With a VLAN capable router you can do what is called router-on-a-stick, where all the VLANs are trunked up to the router, and it handles the Inter-VLAN routing. You can also set it up where the switch is everyone's default gateway, and it does the routing. In that case you would just have a point to point link between the router and switch, along with some static routes to make it all work.
So basically with a layer 3 switch you have some options, but you will still want a router for the NAT and the firewall features. It is possible to put a layer 3 switch directly on the edge, but only if you own enough public IPs for all of your devices.
Hope that helps a bit,
Senior Network Support Engineer - Cisco Small Business Support Center
The SF and SG200 'Smartswitch' is not capable of Inter-VLAN routing. You will want to add a router that is VLAN aware (RV110W, RV120, RV180(W), RV220W, etc.) OR use your current router with a Layer 3 switch such as the SG300-10.
Cannot Add a New Switch to an Existing Stack
Stacking is a network solution that connects two or more switches on top of one another and configuring them as one device. The switches in a stack function as a single switch...
Configure the PNP Settings on a Switch
The installation of new networking devices or replacement of devices can be expensive, time-consuming, and error-prone when performed manually. Typically, new devices are first sent to...
SG350X, Sx550X: RSPAN Mirrored Packet Loss when Forwarding
February 12, 2017