I suggest you keep the subs. Multiple subs not only supplement the low end, they reduce room modes and greatly smooth your response.
Below is a recording from my room using four subs, but the benefit is largely gained with just two.

Just upgraded my speakers - do I still need the subs
I just purchased a used pair of KEF reference one Meta speakers to upgrade from my LS 50 Metas which I have paired with 2 KC 62 subwoofers. I am looking for some opinions on whether I need to keep the subs or whether I can go ahead and sell them along with my LS 50s.
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