hello usp...
When you took them to the store the 1st time, it sounded like the M80s were placed to the outside of the Energys. This places them wider apart, which creates the sweet spot farther away. Maybe the Energys, being closer together, created a sweet spot closer to where you were sitting. Put an M80 on the right (or left) side of each Energy. When you switch back and forth between speakers, move your listening position the same amount left and right so that you are always listening from the center of the pair that you are listening to. The imaging is always best in the center, regardless of the speaker.
Use an SPL meter to level match them.
Toe in/out. Keep it to less than 1/4". Too much seems to create "confusion" (at least it does with my 60s).
Why not ask the sales guy to bring a pair by YOUR place for an in-home demo? Tell him to bring the speaker switch & some wire. Neither speaker is going to sound the same in your house as it did in the showroom. If he won't do it. Ask him if he'll let you buy a pair, and bring them back "no questions asked" if you don't like them? If the Energys sound better to you there, I say keep them.
