When it comes to vocal processing my skills are pretty weak. Mainly because I don't have good voice (or maybe good microphone ;) ) so quite often I just dont have proper base material to work with. One possibility to get good vocal is to ... find good remix competition. For example, if you would like to have some nice male vocal stems, there is nice remix competition on Indaba Music. Remix Kris Allen's (winner of American Idol season 8) newest single "The Vision Of Love" and you'll get free stems (free Indaba Music account allows you to enter three remix competitions for free) + you may win shiny $ 2000 :) Well, I took part in about 3-4 remix competitions. Never won anything but actually I learnt a lot. I always had a problem with finishing my tracks. Strict deadline (which is 19th April in this remix competition) really helps to stop "improving" the track forever (so at the end it never gets completed ;) ).
More info: Kris Allen - The Vision of Love