Which RB for PPPoE termination

Hi,

I need a central router for the following usage:

Scenario 1
50 PPPoE tunnels termination
NAT
Basice firewall rules
SFP port
200 Mbit/s throughput

Scenario 2
100 PPPoE tunnels termination
NAT
Basic firewall rules
SFP port
400 Mbit/s throughput

Scenario 3
200 PPPoE tunnels termination
NAT
Basic firewall rules
SFP port
800 Mbit/s throughput

What Routerboards would you recomend for each scenario?