Yeah, those are fine.
I'd probably want to upgrade soon, but they'll definitely do for now. The PSU is perfectly good quality, but I'd maybe upgrade to a higher end, modular unit when you have some spare cash.
For case, it's kinda personal preference. The H440 is still a fine case, perfectly good quality(like the PSU), but I got sick of mine pretty quick and swapped it out a while back now. You'd definitely be able to improve airflow with a case upgrade, but honestly temps with your H440 should be fine and if you still like it, no reason to change quite yet.