1. Good airflow with at least one fan at the top ->easily done with a dremel
2. Mesh front ->whatever for? And second most important?
3. Black (preferably with some silver) -> easily done with paint if not standard
4. Windowed (preferably with fan monts) or mesh side panel -> windowed + fan mounts unlikely. Can get windowed panel and cut out holes or do it all yourself. Intake fans on the side tend to badly disrupt airflow.
5. Good inside layout and cable management -> almost any count, cable management is the user as much as the case. no cases have ridiculous internal layout thanks to the atx spec
6. PSU at the bottom -> why not the top? Case airflow will have been designed around either location, so this is rather taken care of by 1.
7. Black painted interior -> paint it yourself if need be
8. Seperate compartment for the PSU & HDD's -> this I'll accept, it is nice. Few cases do it though.
9. Room to fit watercooling (at a later date) -> this I would have put second in importance, after good air cooling
Basically you've written a very strange spec. 1/2/6 are 'good airflow', 3/7 can be painted, 5/8 are both internal layout. 4 is standalone, as is 9.
So I propose as a condensed spec, as a working specification is about themes rather than specifics. It should not restrict the available solutions.
1. Can be cooled well with air
2. Can be cooled well with water
3. Sensible internal layout, so is tidy and easy to build in
4. Is black inside and out, as I'd rather not paint it
5. Side window / side fan intake
If you're up for modding/building from scratch then clearly all of these can be catered for. Side window + fans is always going to be tricky. I therefore assume you don't want to mod any of it, and as is standard in these threads, I recommend the Akasa Omega.
1. 6 120mm fans, psu is at the top but equally is in it's own compartment. As long as you don't aim the fans directly at each other it's hard to go wrong.
2. Will hold two 120mm radiators and a 240mm radiator without any modding or mounting in the door. Large case, hardly a lack of room for fitting pumps and so forth.
3. The enormous thread on the akasa mirage/eclipse/omega demonstrates that the internal layout is phenomenal. It's wider than most cases which gives a lot of space behind the hard drives and optical bays, and space either side of the psu to put spare psu cables. No modular supply needed.
4. All black except the removable motherboard tray, which is chrome. Internally black as well.
5. Comes with mounts for two 120mm fans in the side panel. A nice windowed panel without fans is available for purchase. So without modding you can have one or the other.
So, with the revised spec, the omega hits 4.5/5. From your original, I think far too restrictive spec, it hits 6.5/9 as it even has a mesh front.
Thoughts?