ok which is the best way to connect a wireless router
i used to do it this way
cable modem via usb to pc
pc to wireless router by eth0 card via ethernet cable

this meant all wireless connections went through pc, all connection laptops had to be 'set up' but pc had to be on all the time and as duel booting into linux had to set up nat

however i could see all internet traffic passing into pc

now i have a cable wireless router which is plumbed into the cable modem
this means i do not have to have a pc on all the time, no need to worry about natting but i can not see any other internet traffic passing to router

which is the best/most secure method of setting up router?