4.0 very good, I had an "OH OH" moment when Track 2 "Here They Come", Alvin's vocals are a strong rear left and a light front left. But that was just the one song, all the rest where either phantom center or left front.
Just finishing the 5.1, I totally disagree with others that say the 4.0 is better than the 5.1. The 5.1 is WAYYYYYY better.
We have sun in CA after 3 months of rain, and the front and rear yards are a shambles, wife wants me to get to work, will feel good to be out in the sun.
One more to go, ATMOS, can't wait.