Those mains look pretty sweet! I wonder how those would compare to the Seos? What kind of horn is that?
As for the subs, my advise would be to make them into really nice end tables. There are all kinds of builds in the archives that did just that. You can make them look no different than any other end tables, only these will have subs in them. You could even go with a down firing driver arrangement so that no one would know otherwise!