Stay off the Kraken, Firecuda and elite version of the case for now.
Water cooling isn't a good choice unless you have pretty much the best performance you can get, because that money will always be better spent elsewhere up until that point to put it bluntly.
That PSU needs to go also.
Do you plan to OC?
Your board is a B series board, meaning you won't be able to OC on it.
If you want more SSD space for software, get this as well as the list I posted.
Not necessary though imo since if you're only storing OS on that SSD which you should be given it's low capacity, there should be some room left over for software and then 20GB spare to keep performance from dropping. It's here though...