I would put the same neck on both of those: Black Ebony over Roasted Maple. Looks classy, feels great, and plays like a dream. You don't really want a highly-figured neck on bodies like that. It gets too busy. The body is the main attraction in this instance, so don't diminish it with distractions. Black matches everything perfectly and is unobtrusive. And don't forget stainless steel frets. Putting nickel-silver frets on a new neck is like putting fiberglas bias-ply tires with inner tubes on a new car.
Speaking of not being too busy, if you have any photoshop skills, it might be worth it to see what solid cream pickguards would look like on there rather than the pearl textured parts.
As for gold vs. chrome, either would look good with those colors, but chrome usually seems more natural with colors on the UV end of the spectrum like green, blue and purple are. Gold seems to meld better with colors on the IR end, like yellow, orange and red. Of course, it's not a hard and fast rule or anything like that.
Plus, chrome wears better. Even on high-end hardware, the gold plating is vanishingly thin and even if you don't have alien acid-based blood/sweat/tears, you can just wear the stuff off with nothing more abrasive than your skin. If these guitars are going to be in professional rotation out on gigs getting a lotta play, chrome would probably be the better choice. If they're gonna be homebodies that don't see a lotta hours, or may end up being wallflowers most of the time, then gold always looks great and will stay that way.
