Unshielded, is easier to install and you do not need to worry about accidentally shorting with the shield.
Cat6 Twisted pair nullifies its own EM field, as does Cat5 UTP. Thus unless you need to shield the connectors/cable from a particular source if interference, go with unshielded.
We don't bother using Shielded in most office or data centres, so unshielded should be fine in your home.