Thx for the replie. Budget whise, it would be nice if its not like a 150/200 €/$ Case. Something thats not ugly as hell but provides good airflow, while holding 360 rad at top. I have two SSDs and one HDD.
Edit: That Said, i think my 280 Arctic is enough for my CPU and it would be enough to put that on top, so My 3090 can get the pure fresh air from the front Fans. Therefore i need a case where i can fit my 280 Rad from Artic (its a biggy) on top without killing my Ram XD.
So Its more Important to me that the GPU ist getting enough fresh Air! Thats my main goal, get the Temps down on the GPU without Watercooling it.
Corair 4000d airflow would do well if you're sticking to the 280mm. 5000d if you think you might go 360mm later.
As far as the rest, top mount or front mount doesn't change a whole lot. Just make sure part of the rad is above the pump. If you go front mount, tilt it towards the back for a little bit so that the air can go to the rad. Hoses would go into the bottom of the rad in either case. You could also set the rad on top of the case, mount the pump and then mount the rad so it stays at the high spot.