Zec miner providers

I would like to buy a new pnp rig for zec mining. Would you mind pointing some credible rig providers so I can check prices. Also is there any chance that those rigs might come hacked , is this something that should have me worried? Completely noon with mining so be gentle for any idiotic questions!

and

i joined the forum just yesterday! Feel free to move, edit or anything you like that will make this forum work better for its members! i am now reading the common questions and answers you suggested. Thanks !