I can’t see the picture of the room layout but, I’d start w the basics. I’d first figure out what seat you’ll spend the most time in listening to your records. And I’d set up the Revels to get a really good 2 channel first. Then I’d go from there.

Remember you want to try and make an equilateral triangle with your seated position and the distance between the speakers.

The absolute best way to determine speaker location in any room, for any speakers, is use the speaker set up track on the XLO Test CD or similar test CD. Anything with an out of phase track. The very best sound when the system is in phase will be when the out of phase track is the more diffuse, meaning it sounds like it’s coming at you from all around the room. Another tip is that speakers should generally be placed closer together, some folks believe wide apart and toed-in is good for wide soundstage, but it’s not. The best soundstage will almost always be achieved when speakers are, say, 5 feet apart, for example. The out of phase track will demonstrate this idea.

Without a method such as the out of phase track being able to find the absolute best locations for the speakers is like finding a needle in the haystack. You might think you found a set of good locations, but they are only local maximums. Trying to find absolute best locations without a definite plan is like trying to solve x simultaneous equations in x + n unknowns.