Cable internet questions

Well i'm finally going to get high speed internet in the next few months. But i have a few questions... I'd like to turn one of my old computers into a dedicated firewall, would smoothwall or the SuSE firewall be a better choice? The computer is a old piece of ... 100 Mhz pentium, 96 MB, 2 whopping 1g hardrives ... will this be sufficient?. I take it that it needs two nics, right? (Modem to firewall, firewall to router) Is Lynksys a good choice for a router? Any specific model? Is the setup modem > firewall > router > computer land ? Any faqs or how tos I should read? TIA -- Franklin Maurer Using SuSE 8.2 Pro