I would suggest waiting for the Emotiva LPA-2 to come out before you upgrade. You can buy the XPA-5 now and use the preouts on your receiver to power your speakers. The LPA-2 preamp will offer advanced processing and connectivity. When you do get the preamp processor you will no longer need to use the Yamaha unless you want to use it for another room, for surround back channels(7.1), or for Multi-zone power.