I have two REL Strata IIIs, down firing, each 2.5 feet behind each of my Maggies. There's no room to place them out to the sides in my 11 x 17 room. The two RELs are for each mono block amp. If I were to upgrade my subs to newer model RELs, it seems down firing would still be necessary to avoid direct radiation against the backs of the 3.6Rs from a front firing speaker? And, what newer-line RELs do you like?