Ya the 1054 is kinda what leaning to Evan as I can run at Albuquerque Dragway which is mile high and have no issues getting to light the chargers currently with the ML. I just don't want something to loose. But I'm all ears right now as I won't be buying the converter untill the first of May.
Unless you are going with bigger turbos if you can already spool fine at elevation there is no reason to go with a converter much looser then you already have.