Don't get a 1TB SSD as it won't last as long as an HDD.
Just get a 500gb one for the main OS and some programs, then spend the rest for raid on your HDDs. Hotswappable drives as a NAS is pretty cool.
Get a better PSU, try at least 600 Gold rated. Don't cheap out on your PSU, but don't go overkill either.
I recommend getting one 2k Monitor and two 1080p monitors. So you can have a main gaming monitor and the others for lesser projects.
Get an aftermarket cooler as well if you don't like the Wraith~
Goodluck getting a 580 during this mining crazy time~ Try getting a 1080 or Ti if you can. Focus on your GPU if you're planning to go triple monitor.