That sounds like a great

That sounds like a great system. For the tasks you’ve listed, you won’t require the Core i5. You could get away with a Core i3 or even a Pentium or Celeron. You might want to consider something like the i3-2100t as it has a bit better power/thermal characteristic. IMO, the stock HSF in the i3-2100 and i3-2100t (the T-variant has a thinner profile HSF) are both pretty quiet and you may find that you don’t really need to splurge on the Scythe. The stock HSF on the Core-i5 2500K is not so quiet.

Have you considered going with a low-profile chassis or even mini-ITX? Or are you going for something bigger to have more storage locally?

Storage drive( s ) and operating system are missing from your build list.