I am moving into a new townhome & have a decision to make.  Wired or wireless? 

I have a Dell Inspiron 8600 and will be connecting with cable.  I haven't purchased a router yet, not sure which way to go.  If I go wireless I will have more mobility & if I go wired, I may have wires running all through the house.  I hear that there are security problems with wireless?  Do you have any suggestions?