Purchasing a whole new router that can handle these speeds is too expensive hence the switch idea.
if we remove the router completely. Can I get Gigabit speeds using just a switch and 2 wired devices? Can't I just plug the WAN line from the router into the 3rd port on the switch? I know that all traffic to and from the router will be limited but the 2 devices connected directly to the switch should be fine right?
I answered my own question I think. removing the router would mean I can't connect to the internet since the switch can't handle it right? Switch vs router deal...
This depends on what type of service you are being provided from your ISP
The purpose of a router (AKA, NAT device) is to allow multiple sessions from a single public IP address (see NAT:https://en.wikipedia...ess_translation). For most home lines, you are assigned a single IP address which all devices behind your router use. Businesses can have a block assigned to them, such as x.x.x.x/29 which allows them to use 5 public IPs. If you use a switch directly connected to your ISPs device, you will most likely only be able to connect one device to the internet at a time as you are only allotted one public IP address from your ISP. However, I've never connected a switch directly to an ISP modem. I don't know this for certain.
To answer your question, my thought is that you will still be able to connect to the internet using the switch, but it would essentially be the same as plugging your computer directly into the ISP modem.
In the case that your ISP will continuously assign public IP addresses via DHCP for every device that is connected, your switch idea would work; However, I wouldn't recommend it. You would be leaving your computer open to the internet and therefore completely open to vulnerabilities. It's certainly not a recommended way to use the internet, but I empower you to do whatever you choose is best.
I agree with the others in that the best solution is a Gigabit WAN supported router.