Well? Do you live next to a wardriver? I wouldnt give two shits if I was running WEP in my neighborhood (which I am not, I am running WPA), because I am surrounded by 65+ year old people. If you just want 8 year old Timmy to stop playing WoW on your connection, WEP will do you fine. Now if 8 year old Timmy is a hacker (which he could be, kids are getting smarter), then go with the higher protocol.
You know what, just go with WPA.