Is there a decent (meaning less than $400) receiver out there...
No, not really. Not sure there are any decent receivers regardless of price, might be a couple.
Is there a "decent" receiver out there that could interface with the McIntosh MXA70?
I just purchased an MXA70 primarily to listen to my jazz CDs but now I'm thinking it might work well with my smart tv. Is there a decent (meaning less than $400) receiver out there with hdmi / arc ports that can work effectively with the MXA70? Space and budget restrictions prohibit me from wanting to indulge in a soundbar.