there is no one right answer. and it is somewhat related to the seriousness of your system and asset allocation.
if you have optimized everything else first to a reasonable degree, then having long interconnects and removing your rack from between your speakers might be the next step.
however;
--it might depend on what is on the wall behind the speakers. it could be that your rack is acting like a diffuser and helping if you have a flat bare wall or a big window. those things will not be improved by moving your rack.
--and how much a long interconnect or long speaker cables might cost. you might improve another part of your system with the same budget as the longer cables and get a better net performance gain.
the moral of the story is that other things need to be at a point where this change will help, or it's not worth it.
