A 7-2 court will be hard to get to. Replacing Scalia with a like mind will just keep it at 5-4 or 4-5 depending on the case. Getting to 7-2 would require getting past Ginsburg (who could go at any time) to replace Kennedy (who shows no signs of infirmity or wanting to retire) or -- even more unlikely -- Kagan or Sotomayor -- plus we need to keep Thomas' seat firmly conservative. At this point, I'll just be happy with replacing Scalia with a like minded Constitutionalist or originalist and the prospect of replacing Ginsburg with any of the aforementioned prospects. Getting to replace Kennedy or Kagan or Sotomayor with a conservative (or hell, even a moderate as none of those three is even remotely moderate) would just be gravy.