Router suggestions

Hi everyone,

I put this on r/sysadmin, and I forgot r/networking existed (sorry).

We are looking at replacing our existing infrastructure, and I wanted some advice on what we could use. We are due to start using SAP which is served with citrix and we are in the UK.

We use clearos on a variety of old servers at the moment as our gateways. Head office has 25 users while the other depots have some people, possibly 20 people altogether, who need access to resources at head office. Head office uses a leased line and has a single mitel (save me) pbx server which the other depots use, there are no other pbx server in the company.

The other 5 depots use the gateways as the DNS and DHCP server, and they connect back to the head office via VPN. All depots don't have failover WAN which I want to correct for at least head office as it's the most important. These clearos servers are very old and have a tendency to break so I'm looking to standardise the configurations together, so I was thinking at a edgerouter pro for each depot and head office.

Does anyone have any good recommendations for what router(s) I could install for each depot? Or any other suggestions in general.