In terms of storage, I would like to add a large hard drive as well, but to be honest, I wasn't sure what the "quiet" approach to a mechanical drive is (I read about soft / rubber mounts or hanging with elastics, but it seemed a bit complicated!). Any tips would help, I'm open to advice!
You could take a 2 or 3 TB WD Green (the quietest 3,5" reviewed here at SPCR) and suspend
it in the 5,25" bay using elastic cords. There are tons of photos of suspend hard drives here at SPCR for inspiration. But if you don't fancy a DIY suspension system, there are after market solutions.
As for the case, I read the review as well on the case and it scared me a bit (didn't seem to cool nearly as well). You suggested that the PS07 would be better if I modify the stock fans. I'm not sure I fully understand how to modify it though. A few questions about it:
1. I think the idea of modifying the fans / moving them around is a cool idea. To make sure I get this, you are suggesting that I take one of the two fans and place it in the rear, and take the second fan and either leave it in place at the front, or attache it to the GPU (with zip-ties -- will they melt?)
2. Either way, what fans would you recommend I use instead of the ones that come with the PS07?
3. Is it relatively straight-forward to swap out fans (just need a regular screw-driver? or does stuff get interesting / more complicated and require more tools?)
1: That's exactly what I am suggesting
And no, the fan won't melt. The GPU will only reach ~70 C during stress testing (Furmark) with a very low rpm fan. And that's shouldn't be enough for plastic to melt.
2: Try the stock fans first (you might need to undervolt them). If you don't like them, then come back and ask the forum for suggestions.
3: It's a very straight-forward proces! A regular screw-driver is all it takes.