[Staffslug] Firewalls

Hello everyone I've been running Endian Firewall Community Edn on our office network for the last 3 weeks. I seem to be getting some reliability issues, but I'm not sure if they are being caused by the software, the PC it's running on (a cheap PC, but reasonable spec), the ISP or something else on our network. Has anyone any experience of this distro? I'm considering scrapping it and buying a ready made firewall appliance - I haven't got time to be messing around with this. Does anyone have any recommendations? I need traffic shaping and I'd prefer content filtering. Thanks Al