Hi nicksteel,
Don't put a signal booster on your line
I assume your signal is already strong enough, and if you add an amplifier, you'll only saturate your input and also increase the noise.
A signal booster is only useful if your signal is very weak, but clean. That means that it doesn't contain other types of terrestrial interference.
You can try to put ferrite beads on each of your cable ends, and this will remove most external interference that is being induced in the cables.
You can get ferrite beads at your local Radio Crap store.
I MEAN, "Radio Shack"
-kwag