No reason to turn the subs off and nerf the sound quality for music. 8361 + subs is better than 8361 on their own, for both music and movies. Only reasons I see not to use subs are
1. Can't afford them atm
2. Can't fit them
3. Don't want to mess with setting them up
Seeing as none of those apply to you, there's no reason to only have the best sound quality for movies
.
BTW, you can use GLM + Dirac pretty easily, and they work awesome together. That's what I'm doing right now.
I think if you didn't have subs, the 8361 would be the clear choice, as although it still needs subs for full range sound, it's much less gimp than the 8351.
With subs, I can see pros for both. The 8351b gives you a slightly better on/off axis response, and a slightly prettier beamwidth. The 8361 gives you more headroom from 80-320Hz(assuming you cross at 80Hz), and controls directivity slightly lower in the vertical position.
Side by side comparison.
View attachment 126750
8351 is a
little better, but it's a pretty small difference. Weigh that vs the extra midbass headroom you get with the 8361. I think you can't go wrong with either tbh.