What you are describing is essentially a seven π speaker. If you don't make the bass bin into the traditional π cornerhorn shape, you could instead make it into a box a la four π or even into the shape of the eight π bass bin. Of course, if the bass bin isn't put into the corners, then the midbass and lower midrange radiate into halfspace or quarterspace instead of eighth space, and there are penalties, both in terms of directivity and boundary loading. But if you don't have the corners, then those options aren't available anyway.Personally, I like my cornerhorns and my two-ways. Both sound great to me. The cornerhorn is definitely a better speaker but the two-way is 95% as good, so the midhorn and corner placement are Nth degree things. If I didn't have corners for six or seven π speakers, I'd probably go with the four π using the JBL 2226 and DE250. Either way, add subs for smoothest bass. You can do it a step at a time, making your mains first and then adding subs later as an upgrade path.