First of all: Do you have a dog? I am living in Springfield about as long as you and haven't had a burglary (bikes stolen from the porch, but even that stopped about 3 years ago).
AC cages: check with "sheclown" here at metrojax. They make cages and they are located in Springfield so they know what works / doesn't work around here.
Cameras: If you just want to PREVENT burglaries, fake cameras work about as well as real once. If you want actual footage, you got a good number of options. For a start: Anyone of the "DVR+x cameras" systems will work ok as long as you go wired (QModo, SVAT are some of the brands, but they are all identical). Don't expect decent images at night. If you want better stuff, and like to geek out: Anything by Axis will get you great images (but at a price) and use the open source software "zoneminder" as a recorder. Be aware that even with expensive cameras you will likely not get sufficient footage to find/convict someone. in particular at night.
Sensors and such: Best to integrate with home automation. Go with an Insteon based system (maybe z-wave, but it is newer). Avoid X-10. Sensors will run you around $40 a piece. But then you can turn on lights, sound alarms, send e-mails and what not.