HeliComparator, you bring up a difficult question.
AFAIK there are no crashworthy seats avilable that have adjustment possiblities that come close to the best non-crashworthy seats. Agreed, a given seat without adjustment features may be perfect for pilot X, but not likely so for a broad range of pilots. (The car industry seems to have drawn a similar conclusion, and offer seats with numerous adjustments.) I agree that in principle there is no reason a stroking seat should not be just as comfortable as a non-crashworthy seat, but unfortunately this is not the case today. IMHO selection of a non-crashworthy seats may therefor be the best (least poor) choise for some operators.
Note that there is a big difference between military and civilian "crashworthy" requirements.