I would definitely go with the Fireball Modelworks decals. I've used both and Fireball's are the better looking of the two.
Depending on the level of detail you'd want to have, I would also suggest getting the Cobra Company PE set from their SH-60 detail set, as well as Eduard's SH-60 Exterior PE set.
Using both sets really dresses up a 1/48 HH-60J.
Pete Brown