Do you plan on having humans live on this super-earth? I ask because high-grav planets would be really hard to live on. The stress on the musculoskeletal system from weighing a lot more and the increased atmospheric pressure would make it almost impossible to breathe and to move around.

Sorry, I know this doesn't really answer your question, but it's something you ought to have an answer for when you start writing your story (or setting or whatnot), because your readers will wonder.