Nice list! I'll agree with you, I definitely think Jon Jones should be on the top p4p list.
I don't think it would be wise for Silva to move up a weight class and fight Jones though. It would be awesome for the fans but not worth the risk imo for him personally. He only has a few fights left on his contract and he stated before he's retiring after that. I believe he wants to retire as the best middleweight on the planet. If he beats GSP however who else is left to give him a run?