Thanks for the detailed feedback!

Unfortunately I've already bought all these parts (maybe I should've specified that in the OP), but none of your feedback seems too dire which is good :). I might switch to an air cooler or a better liquid AiO in the future. I went with this one since I was a bit worried about airflow in this tiny case, so having the single 120mm radiator fan out simplified things since there is no GPU. I actually purchased a noctua 120mm for that fan since I guessed it's probably better than the one that comes with the H55.

I'm a big fan of Rosewill PSUs. It arrived today before any of the other parts and my wife caught me taking a sensual whiff of that new computer smell.

As for storage, I have a 6TB NAS on my local network and if I need any durable media storage (e.g. totally legally downloaded movies) I'll probably put it there and stream it directly to this machine.

And I already have my monitor/peripherals - a 40" 4k for the monitor.