I own Joseph Audio speakers but room situation is much different than yours. I'm in a 16x23 room, so speakers are about 8ft apart, I'm about the same distance to each speaker, and they are toe'ed out almost straight forward.
For your room size and long wall placement, I recommend looking up "Master Set" speaker setup methodology. You probably will need to sit more near field, as well as toe in more to minimize reflected sound unless you have robust room treatment.
For your room size and long wall placement, I recommend looking up "Master Set" speaker setup methodology. You probably will need to sit more near field, as well as toe in more to minimize reflected sound unless you have robust room treatment.