5.1.2

Hi, (First post) I have a bookshelf speakers Klipsch the fives but now i want to build a 5.1.2 setup and i'm not sure what AVR buy to enable my speakers to be use in a 5.1.2 config. If you could gave me some AVs or what i need to look for in a AV that enable my speakers in a 5.1.2 it would...