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Is keeping the lx85 an option? Does it still work?
It has multi-channel input and 7x amps that you could utilise for surround / height channels. This would reduce the number if power amps you need immediately and you could replace it over time if desired.
I've recently made the move from an AVR to separates (Sherbourne PT-7030 + Emotive XPA Power Amps). Logically and practically, I find this much more sensible and flexible. When all the hoo-ha over height formats and HDCP and HDMI versions settles down, I'll upgrade the processor and keep what are fairly fine amps that work well with my speakers. I expect to keep the amps for years to come.
If purchasing all those over amps seems daunting or expensive, go for a really good stereo power amp (or mono blocks) for your front L/R and pick up a second hand receiver for other channels. It doesn't even have to be modern - you only need multi-channel input capability - it doesn't even need to have HDMI so you can go back many years and get a real bargain.