Lack Of Resources.

Well, it seems my internet can't handle four computers, two wiis and two xbox(es?) running on the same connections. Every device is having major lag, whether the others are in use or not. I find myself having to restart my router multiple times in a day. I have made a good effort to try to locate the thief of my bandwidth with no success. I think my only choice is to change my connection to one with more bandwidth, but if I do that I lose my unlimited downloads. This is a tough choice, but I cannot handle this lag anymore. It's becoming... tiresome.