I have been following this thread to read how different opinions can be.
Stat users are either in the ML camp or "other"- Soundlab, vintage Quad or whatever.
Your 13A's to my ears can sound very impressive with basic placement according to room allowance.- living space or dedicated.
If it's NOT dedicated, then you accept what you have and enjoy.
That's including bass response. As audphile1 mentioned- those things need to be pushed out into the room. If space allowed doing 1/3 of room or Cardas might be ear pleasing.
Sub or subs will always make the experience more enjoyable.
It doesn't need to be so technical as implied here.
Just my thoughts. I use ML's previous generation, bottom of the "premier" line Theos-passive woofers. They are supported by 2 ancient REL's but alone deliver listeanable performance thanks to placement and SOURCES.
I can just dream for know about some giant Soundlabs and a swarm of REL No 32's.