Reciever Upgrade Help

Hi!

I'm looking for some suggestions for what to upgrade my current receiver to - current setup as follows:

Yamaha DSP-AX863SE
Sony S370 Blu-ray
Monitor Audio Radius R225 fronts & centre / R90 rears
REL Quake Sub (although possibly thinking of also upgrading this)

I'm looking to upgrade the amp as I need an extra HDMI input & also, as a fully functioning iFanny, I want Airplay functionality!

Was looking at the Pioneer VSX-LX55, but concerned that it might not match with my speakers (and now will probably struggle to get one anywhere!)

Any help/advice greatfully received?!

Cheers!