Ok have finally gone wirless but unfortunately for the moment just have the one desktop pc on the "network"

My question is about security which should i choose?
64 bit WEP, 128 bit WEP, WPA (with radius server) or WPA PSK (No server)?
And would there be any advantage in using McAfee Wireless home network security ?
I intend to be running 3 pc's on the network 2 desktops and a laptop.
Its a wireless "G" modem/router and kit.