ML Summit owner here. This is my "big" system in a larger room than yours with high ceilings and it fills the space beautifully,including excellent bass.
Even with 200 watts of Class D amps per speaker to power the two 10" bass drivers, they still like lots of power. The best bass I ever experienced with them was with a Bryston 14B-SST2 amp, yes 600 watts/ch. Interesting ML specs the Summits with a 20-600 watts/ch rating.
I found the SST2 series of Bryston amps were too analytical for my tastes,so I now happily use a Moscode 402Au at 200 watt/ch. Not the same bass slam as the Bryston but still plenty for my taste.
This is my somewhat long winded way of saying yes, a Summit/Summit X would give you excellent bass and obviate the need for subs. And, the best WAF. :)
Even with 200 watts of Class D amps per speaker to power the two 10" bass drivers, they still like lots of power. The best bass I ever experienced with them was with a Bryston 14B-SST2 amp, yes 600 watts/ch. Interesting ML specs the Summits with a 20-600 watts/ch rating.
I found the SST2 series of Bryston amps were too analytical for my tastes,so I now happily use a Moscode 402Au at 200 watt/ch. Not the same bass slam as the Bryston but still plenty for my taste.
This is my somewhat long winded way of saying yes, a Summit/Summit X would give you excellent bass and obviate the need for subs. And, the best WAF. :)