On the one hand I want to say that Caviar leather is more casual and therefore looks better with the SHW. However, since you have mostly gold jewelry I say go for the GHW. I am the type of person who likes to have metals match. All of my jewelry is platinum/silver and therefore I would not buy a bag with GHW. Maybe that's weird, but I like it to match!
first time I prefer like silver hardware...my first Chanel is jumbo black caviar with shw..and the second chanel bag is m/l black caviar with gold hardware..because i want to different..
Finally I think silver hw is nice for jumbo..and gold hw is so cute for m/l