My opinion? Make GSP/Anderson happen before the fight goes the way of Fedor/Couture, Liddell/Wanderlei, etc.
Do we need another super fight? No. It's honestly now or never though. Once one of them loses, the stock of this fight goes down tremendously. Weidman and Hendricks will be there. Just do this stupid fight now or be done with it. If it doesn't happen next, I don't want to hear about it anymore.
I think you have a great point, but at the same time I don't think GSP offers much to Silva based on how he looked the other night. I'm sure ring rust had a lot to do with it, so giving GSP another tune up fight might be a good idea.