A couple of observations...
First is, it seems a shame to put a very expensive i5 processor into a cheap and nasty case/PSU combination. It's always worth spending money on a decent PSU - I'd expect to spend on a PSU alone at least what you've spent on a case/PSU. It'll almost certainly work, but it's less than ideal.
Kinda similar observation on the motherboard. You've chosen a nice one - seems a shame to skimp on the case/PSU.
Much depends on what you mean by 'light gaming'. Today's games are pretty graphics intensive, and typically need a discreet graphics card to play them satisfactorily, even at fairly modest settings.
Personally, I'd perhaps spend less on the processor, more on the case/PSU, perhaps save a little on the memory and see if you can add a graphics crad.
I'm assuming that you already have screen, keyboard, mouse, operating system ready to load etc.?