[Upgrading from 5.1 to 7.2]

Hi All,

 

I am planning to upgrade from 5.1 to 7.2

 

When i initially purchased my setup I got a sweet deal on a Klispch gear, so all my speakers are Klipsch.

I am using an Onkyo-NR-709

2 x RF-82, 2 x RS42 & RC62

Klipsch SW-112

 

Do I need to get the same sub to the one I already have?  Klipsch SW-112 If not what would you recommend in the used or the new?

 

I would also be looking to add 2 more speakers. What would you recommend in the used or the new?

 

Thanks you