Now I've read the whole thread I'd like to make a minor comment on the (slightly silly) toe-in/Blumlein right or wrong debate.

1. How far are the speakers (however they are 'toed') from the walls? Surely the timing and proportion of direct to reflected sound will be crucial here. For example, speakers listened to nearfield in the middle of a large hall will sound far more 'stereo' than speakers which reflect off back or side walls.

2. The frequency has a large effect. Deep bass cares little  whether speakers are toed in or out while high frequencies are very sensitive to such things.

Regards

Steve

PS: Blumlein was a genius - one of the few in the field.