A:
the 1/4-ounce size is definitely too small for striper because of the small hook but any of the larger ones should be work well with 3/4-ounce being the best overall size for stripers.
as for color, silver is the best color overall, especially in the fall when stripers are chasing shad. gold is a good alternative in the spring and summer when they'll also eat bluegills and crawdads. i have never used the black nickel color before.