If you can be patient, I can help you and design custom speakers, but I leave for the UK for three weeks on Monday. For speakers of the size you are going to need, I strongly advise a two way, or at most a 2.5 way speakers. Since they are going to be on the wall, then almost certainly 2 way.
They won't need much if any baffle step compensation.
If you take a standard kit, the Baffle Step Compensation is going to be excessive. This is going to be much more akin to in wall design.