How to judge the reputability of a journal that seems to be of poor quality, but has a distinguished editorial board?
You've already identified part of the problem:


Deceased individuals like Paul Samuelson and Ilya Prigogine should not be listed as "editors" of a normal journal.
The editor-in-chief of the journal should be clearly identified.
They're claiming to have an Impact Factor when they're not indexed by the services that publish Impact Factors


You can see Beall's full list of criteria on his blog Scholarly Open Access.