Just upgraded my speakers - do I still need the subs

Yes! Always!

Try the REL No. 32. “They’re Grrreat!”

As it should be for 10 grand 

Yes, I would keep them for the time being and see wither or not it going to benefit from it. Unless you need funds for something else,  I would hold on to them if you end up needing them in an event you are changing speakers.

No need to sell.  Run the fabulous Reference 1 Metas and use the subs for just the very lowest frequencies given your room anomolies; likely 50 and below.  You do not want to infiltrate that soundstage with too high a crossover.  Your subs are fine.

One aspect of having subs that is not often mentioned, is that there is a lot of ambient information carried in the lowest frequencies. This adds to the sense of scale and space. Low frequencies travel long distances and pass through barriers, providing information about distant musical events or the overall acoustic size of a space.

Now, mind you, this is most noticeable with classical music, where all the musicians were playing at the same time, in the same acoustic space, where the recording engineer endeavors to capture the natural soundstage and ambience of the acoustic space, and the musician’s position within it. 

Even floor standing speakers will benifit.