I’ve owned the 8’s for a year and have them in a much bigger room than yours with dual SVS 3000 micros crossed at 65 hz. I can’t say enough about all the things these speakers do WELL!
Various test of the 10s… the first version of the 10s that is, show they go lower but they are a lot brighter. Since you have a sub, you probably don’t need the extra extension of the 10s… but you may not like the top end if you have a live room or are sensitive to brightness.
How low of a listening level are you hoping for… the 8’s are very good at 65-70 db.

