Hi chironti & welcome to Poco Forums,
Don't know which are 'the best' for a small company, but you could check out Kaspersky, Avira, NOD32 & others.
As for anti-spyware I use SUPERAntispyware & MalwareBytes' Anti-Malware.
Further more I have FirstDefense Rescue Workstation which saved my laptop several times when trying out security tools (FirstDefense ISR previously).
They do have a
server edition too.
To resume, there's no best. Only the one you feel comfortable working with and doesn't give problems with other applications installed or your hardware.
Hope that helps a bit.
