Persona - Cables and Interconnects

Hello, need some advice for a system I am building in my 14x19x9 ft bedroom.  I have the persona 3fs(right left and center), and coda 8 amp V2 - 250 watts, since I like my music loud and movies 70%movies/30%music.  I have the Marantz 7705 right now for my receiver. I plan on selling my three  outlaw monoblocks which I have now in my old system but should I save one monoblock for the persona middle channel or get a Parasound A21 or something else for the center and what cables and interconnects do you recommend: audio envy or black cat or another? I have a new svs sb4000 subwoofer, too.  Thanks in advance for the advice.