Welcome to the forum.
Check to see which cables or adapters come with your video card.
Your motherboard probably comes with several sata cables for your drives.
You might want to buy a mounting adapter for your Samsung ssd unless you are buying their ssd kit that includes the bracket.
Make sure that your HyperX ram height won't have clearance problems with your Noctua cpu cooler.
Check out List Of Australian Online Retailers for possible suppliers. It's an old thread but it might help.
Good luck with your new build.