Well I hate to raid on your parade, but Olympus has not released housings for past E-P cameras and if they were going to it likely would have been announced by now as it has been for past E-PL cameras. I would also not hold my breath for a Nuaticam housing because they are doing very well with the NA-EM5 and will likely stay with OMD and EPL housings for the Oly camera line.
I don't disagree strongly, sure wouldn't bet money on anyone making a housing for the E-P5, but the underwater scene modes give me a glimmer of hope that Olympus might change course on their previous E-Px housing plans. The improved AF and improved viewfinder of the E-P5 I hope would create some interest in getting this camera underwater. The next OM-D will likely get those features too and perhaps we'll just have to wait until housings for that. More being hopeful than predicting an E-P5 housing.
"Not sure what ZEN port you are for $1600.00+ but I own the ZEN 170mm optical glass port for the EM5 housing and it retails for $995.00 and most will buy the Nauticam 6" port for 7-14 which is much less."
$1600+ for housing, port, accessories (zoom gear, port adapter, etc) I believe the Zen WA100 port or Nauticam ports are about $500. $1000ish for Olympus housing, $1500 for Nauticam. So $1600 is about minimum with dome port, you might get an OM-D set up for as low as $1400 if you get the Oly housing and flat port, but that's crippling yourself to save a few hundred bucks.