Any idea what hash rate these z400s in the newegg link in the OP get by themselves (I understand it'll be very low)? Also, would these z400s be solid for keeping wallets on as well as light internet use?
I have no idea what the stock graphics cards do... but the stock CPUs are also generally very poor for mining as they don't have AES.
As for using these daily -- they are quite good for daily use / office use. I have bought several for use around my work office.