I have looked at this too with some interest , I recently built a rig for my son using the H440 I was impressed with the build quality . And if the Source 340 is as good then I think this with be replacing the case I currently use as my home server .
I own the white S340. Build is not bad, but airflow is best I've seen with 2x 140mm front intakes.
I do like the red and blue versions. Very subtle.
H440 is still good, S340 is smaller.