I do know what you mean. You've moved from an 800 cu ft room to over 7000 cu ft. And you have puny QS8s and M22s. I had QS8s and traded them in for QS10HP and I am so happy now. My space isn't as large as yours but it's not puny either at 4200 cu ft. My Onk, M5, QS10, EP800 and VP160 - all v4 - completely fill my space. I can't say I feel the rushing of wind or anything like that but my ears give out long before my system does. That's at around 30 to 40 Watts average peak power so it's not anywhere close to taxing my Onk. BTW, I can't say enough about v4 if you read my posts and product reviews.
