Come on guys, wise up !
When you want more tonal range work with a mid format digital camera in 16 bit ! That's it.
As for doing portraits in HDR: hardly possible.
For starters you need at least 4 images taken with different exposures ! I never ever met a subject that could hold still 4 images so that they all are exactly the same. So, landscape, on a tripod, OK, Portrait, forget it...
JOhny