Value for Money
If you are a smaller business, then you might do well with Intego's VirusBarrier and NetBarrier X8 offerings. Using the company's experiences in protection of home Mac devices, Intego designed the software to be optimally used by about 10 or so Mac devices. The software does a great job with a limited number of devices.
If your business needs to protect up to 100 devices, Flextivity Complete will grant you that security but unfortunately this product does not have expansion beyond 100 devices which limits it to small businesses.