FortiGate models to replace various ASAs

Hey All -

I have been looking at all of the models of FortiGates out there and am seeking some advice on what models would best suit a Cisco shop. I haven't found a local VAR just yet that is knowledgeable with Fortinet, but am still looking. In the meantime, this is what I am hoping to replace later this year:

ASA 1: Datacenter ASA 5516 - Around 250 Users Peak AnyConnect VPN users = 80. Averages 10% CPU and ~40% memory. Has four S2S tunnels connected.

ASA 2: Remote Facility ASA 5506 - Around 100 Users Peak AnyConnect VPN Users = 30 Averages 6% CPU and 68% memory utilization Has two S2S tunnels connected

ASA 3: Remote Facility ASA 5506 - Around 200 Users Peak AnyConnect VPN Users = 50 Averages 11% CPU and 68% memory utilization Has three S2S tunnels connected

ASA 4 - Small Remote Facility ASA 5505 Around 40 Users No AnyConnect Users Averages 82% memory utilization Has one S2S tunnel connected

With this project, we are hoping to leverage some NGFW features that we don't have currently, but aren't set on having all of them. I also posted this in the Fortinet community to see if it gets some feedback

Thanks in advance!