If you want to invest in a real workhorse of a server, may I humbly recommend a Sun SPARC Enterprise T5440. They are scalable to become quite a monster, as needed. But they can be pricey.
As someone once said: If you need to serve dozens of users, use a Windows server. If you need to serve hundreds or thousands, use a Sun.
Just curious, is FR hosted on Unix or Windows servers ?
What size - I don’t know the traffic /loads etc so, as I said, just curious as to required hardware for something like this..