Yep, either of those studs will work. The black are the short neck and the silver are the long. The long neck ones will have the same height as the originals so camber gain will be the same. You can use the short neck to play with camber gain or bump steer too.
The cups you have pictured there will work also, they are similar to RPM's plastic. These are the losi HD cups I'm talking about, they seem to be super hard compared to others. Either will work though
http://www.losipartshouse.com/servle...id-Ball/Detail