Please excuse the stuttering :-)
Why spend loads on a kit that is expensive ....
Just use or obtain a good surround amp that no one uses or wants anymore.
Best to get one that has good bass and a subwoofer.
As long as it has RCA sockets on the back you're good to go.
Dont buy cheap ass crap though. Someone maybe selling a good amp but dont know what they have and you can pick it up cheap :-)