120gb is not enough for a windows C drive.
Many things default to the C drive.
When a ssd fills up, it will lose performance and endurance.
240gb will hold a fair number of games.
Why not defer on the hard drive until you actually need the space.
With a 500gb ssd you may never need a hard drive.
Buy a quality psu. Preferably tier2 or no worse than 3.
Credit to @Starelementpokeand @Energycore for helping out with this long-awaited refresh of the old PSU tier list by Aniallation (who previously went several months without logging in), leaving the old list in need of help. This is simply an update of the list that was flawed in creation by the P...
linustechtips.com
A GTX1060 will need only 450w
I might suggest a 550w Seasonic focus.
A balanced gamer will budget about 2x the cost of the processor for the graphics card.
You are about 1one to one.
Perhaps a i5-8400 and a RTX2070 would be a better gamer.