Depends on the effect you want. #4 becomes a medallion with everything revolving around the central star, making it the clear focus of the design.
In #2 the star becomes a square with four pillars in the corners. #1 is a combo of those with a ring around the pillars, and #3 and #5 are balanced but with no major focal point. With all four of those, the eye keeps moving around.
They are all good, but I think #4 grabs attention and presents a much more united image than the others. My 2¢ only. ;)