we have the d4 as rears and they are really good in that role of as stand alone fronts as well. For their size they are great. I have no idea about the Rc10 energy units. I actually responded to remind you that the D4 is rear ported so if you wall mount it at angle so the port can breathe no worries. If you want to but the rear up to the wall then your base will be affected. Not a huge amount but worth considering.
