One thing I would consider at this point, is waiting and keeping an eye out for Black Friday sales.
It wouldn't surprise me if A4L doesn't have something like the Focal Aria 926's, KEF R700's, or Canton Vento 876's (with matching center) discounted into your price range. (Note that pricing on Focal towers are for a pair while the KEF and Canton are for each).
https://www.accessories4less.com/ma...rand_f[]=CANTON&brand_f[]=KEF&brand_f[]=FOCAL
Same is a possibility for the Monitor Audio (not at A4L).
I suspect the price on the Polk won't drop much, if any, that is already a deep discount!