Speaker setup experts please?

Go to the Cardas website and see their Room Setup guide. It gives you the formula to use to setup your speakers in your room.

The Cardas is a good start, also there are the rules of 1/3 and 1/5 which minimize modal contributions. We have quite a bit of information on our site, including a link to a pretty neat simulator. There is the RPG optimizer (which we also sell). It works well for rectangular rooms, but if you have a strange shaped room then the Cara software (we also sell) is a better choice.

For Wilson MAXX-2's, you should have a Wilson dealer set them up for you. Wilson has a specific methodology for setting up their speakers for which all dealers are trained.

there are a million rules, the Cardas works very well IMO
TAS's HP likes the rules of thirds, for instance if your room is 15 x 21 put the speakers 5 feet apart and 7 feet out into the room - 5 is 1/3 the width and 7 is 1/3 the length. This worked very well when I had Maggie 1.6s but they were so far out it was not practicle.