Change CPU to: i7 6700K +$60
And a suitable Z170 mobo, plenty of good options available from ASUS, Gigabyte and MSI +$30 or so and up
Change Memory to DDR4 3200Mhz ones are decently priced +$30 or so
And get a decent CPU cooler: CM 212 Hyper+ is decent( and cheaper ), but there are much better ones available as well.
That cryorig is just not meant for a pc like this it's for things where size matters and in your case you should be fine with a tower cooler.
Would probably also grab a SuperNOVA P2 PSU 850W for example just to have room to grow.
Also might want to consider a slightly larger monitor Asus PB278Q is pretty good, the 2560x1440 on a 25" makes for quite small text.