You are going to get two anwers on this. One that says do it, that bi wiring makes a big difference, or, don't to it that bi wiring makes no difference. And.....both sides will argue to the death over which is right.
I am the latter. I have done it on many different systems, at the owners insistance. I have never noticed any difference. You are effectively increasing the wire gauge to your speakers, which of course won't hurt. But that's all.
I would suggest spending your money elsewhere, where it will actually make a sonic difference. I think bi wiring is pure snake oil.
This is my opinion based on personal experience. If you decide to do it and you feel it is a positive change to your system, then good on you.