3 channel amp to compliment Pass Aleph 30 for HT

I have considered two more Aleph 30s, but it seemed like overkill for the rears. Maybe the recommendation of 3 Monarchy would be the best bet. But at ther cost 2 more Aleph 30 seems more practical, it just seems like over kill for the rears.

I was thinking the REL sub would give the sound I am looking for in the bass region especially since the Aleph is so high quality for my R&L channel.

In response to:
"Monarchy makes good amps. Not a bad choice, just different."

Maybe a Monorchy monoblock would be good for the center and another Aleph 30 for the rears. (Or even 3 Monarchys for the remainin channels.) How ore these units different sounding. This might change the sound balance.

Maybe it is not a good choice to change amps but stay with all Pass Labs Alephs. I assumed the rears wheren't that critical. Is thisa false impression.

What about another Pass for the rears and not center channel. Just direct the center channel info to the L&R in the sources menu. Yes/no?