PSB SubSeries Subwoofers

Hey Guys,
I am thinking of adding a sub to my system.
I recently dusted off an old sub I used to use years ago...the  Energy e:XL-S8. I hooked it up to my NAD356BEE integrated which feeds PSB Imagine T2 Tower speakers.
Anyways, I was wondering what you guys thought of the SubSeries 250 by PSB?
My listening area is around 7 feet by 14. It is open on one side as it's in the basement.
Do you think this would be that much of a bump up for improved musicality.
Bass, soundstage etc.
Take Care 

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