I picked prosessor only because it's probably the easiest sell to my wife and I'm never done upgrading. I have a good sub, good main and surround speakers, but my rear surrounds,those I'll replace at some time.
She is always remarking, " why don't I hear much behind us from those speakers". I thought of telling her, " somethings wrong with them", but them I have to exsplain why the new speakers don't have much sound either.