I know this is not on your list but with the big push right now for everything to go to "The Cloud" you may want to consider the CCSP. Cloud security seams to be the big thing right now, so it might be the best compliment to the CISSP right now.
CCSP will probably be the easiest for you to study for also. A lot of the information is very similar to CISSP. You just have to learn to think about it from a different perspective. I just used the study guide from ISC2 and was able to pass. The key was taking my time and making sure I answered the questions from a Cloud perspective and not from a CISSP perspective. Because on a lot of the questions both answers were there, at least in my mind they were.
Good luck on what ever you choose.