Out of interest, have you tried sitting 0.5m away? That's the min stated distance of the In-8 but I wonder how it works out in practice.Still not a problem! If I sit right into my desk, I'm 70cm away from each monitor. Again - no issues whatsoever. The coax design does help slightly.
I agree with you broadly that 8 inch monitors don't necessarily need a medium/ big room but the In-8's have powerful bass (according to reviews around the web) and I'm not sure how successfully the (only) 2db LF trim will be in controlling it, so additional EQ will likely be needed in a smaller room. I would have preferred a few more db of cut on the monitors..