see i'm a huge anderson silva fan however a fight with gsp is very interesting. I think silva will win but that is just my opinion. However i would be blind if i did not say GSp has a very good chance of winner. Both guys have never fought anyone near each others skills set. Also Anderson strengths is gsp weakness, whereas gsp strength is Anderson weakness. The only kicker is silva Bjj, and Gsp ability to be a great stiker when he wants to be.
All those fights you listed i would love to see however the silva vs gsp debate for p4p best needs to be resolve. I would love to see any of those fighters more than gsp vs silva however i just want to see gsp vs silva for the debates to be over.
the one fight i have wanted to see for years is rua-silva, best match-u in all mma in my opinion, nothing else.