The Senate talk a couple posts above admittedly put a smile on my face.
Hmm, do you have inside knowledge of something we don't know?
I'm pretty sure I've posted my thoughts on this in another topic, but I have a go again. Let's just look at the five most senior Justices should they leave their respective seats. Keep in mind that if another man leaves the Court, there is the potential for the first female majority on the Court. Don't underestimate the significance of that. Overall, this is how I see things should the situation arise:
Thomas: Sri Srinivasan (though he is sadly ageing out), Candace Jackson-Akiwumi, Tamika Montgomery-Reeves, or someone fitting a similar profile.
Roberts: Kagan elevated to CJ, Alison Nathan fills the Kagan seat.
Alito: Anything goes here. Any Circuit Judge or state Supreme Court Judge (50 or under) or SG Prelogar.
Sotomayor: Probably a Latina Circuit Judge, such as Myrna Pérez.
Kagan: Alison Nathan or Elizabeth Prelogar.