First PC Build need a look over/suggestions.

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Really a nice build. My one suggestion is to increase the size of the SSD to 512Gb. You'll run out of room on a 256GB pretty quick. SSD's are so much better than HDD's, it's worthwhile to keep as much on the SSD. Use he HDD for archive files you don't need access to that often.
Really a nice build. My one suggestion is to increase the size of the SSD to 512Gb. You'll run out of room on a 256GB pretty quick. SSD's are so much better than HDD's, it's worthwhile to keep as much on the SSD. Use he HDD for archive files you don't need access to that often.
 
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That's a very good looking build.

You're spending a lot on the motherboard, but if you're really shooting for high overclocks (assuming you do well in the silicon lottery) it will do well for you. Same on the memory, a bit expensive but if you want lots of frequency options it makes sense. You could get away with the RM550x or RM650x as well, 750 is more power than you need.