I have played a few HD-28V's and a HD-28 once I think. I don't like those necks on the V. I own 5 Martins and if your not used to the MLO (modified low oval), which the Re HD-28 may have, you get used to it. Not sure what neck the Re HD-28 has though. Yes they do not suck.
High action can always be lowered. I set my D-18 up yesterday. I still need to lower the slots in the nut a touch.