Xm Receiver needed for Aftermarket Nav system in 2010 EX?

I am looking at installing a Pioneer AVIC-X910BT system in my 2010 EX and I was wondering if I needed the XM Receiver and antenna kit for Pioneer or if the existing XM Receiver and Antenna can be wired up to the new system?

I assume that the XM component is separate from the Head Unit but could be wrong there - not hugely knowledgeable on these things

Anyone have direct knowledge of this?

Thanks,
Ian