Ugh. Go with the SSA's over the SA's. More cone surface area and extremely well crafted (& 100% USA). Dcon's are just as great for SPL if not better for SPL over the SA's and on top of that Dcon's sound amazing at high SPL. SSA subs are unreal. Until you own them and try them out you won't fully understand the balance of both SPL and SQ that they possess. I have owned both and would, in a heartbeat, take SSA subs over SA subs for any build on behalf of deciding between these two.
My 2 cents.
Also, Dcon's can handle a decent amount of power of their rating. Keep power clean as possible as always though.