Advice appreciated. I'm actually set to move out of my apartment to another city in about five weeks, so I'll be looking into portable security systems, and you can be sure that I'll have webcams on a home LAN with a loud-ass siren. But I'm still getting a gun. Most of my friends have some good weaponry, so it'll be nice to go shooting with them, as I spent a lot of my childhood hunting, shooting skeet, and around a lot of guns in general.
I'm not really sold on webcams or CCTV for security. They can help legally, post-break-in, but less so in the immediate moment of a threat. If it's a choice, I'd personally put my money on stronger entries and decent lighting... Talking to your neighbors can help too if you know the person's appearance.
I'm stuck renting places for another 4+ years, but when I'm done, I'll build a house.