900D is just for 5-10k builds cause less hardware makes it look less good. 800D (The window is bit too big , so you see the lower part of your build) , still looks good. 820 just a beast - internal design kings of NZXT Out of the row - HAF cases - black/red color doesnt fit my room but haha , it may fit in yours? They are all good for AIO WC as they have enough space to fit small 240/280 rads or of course the 120/140 ones without any problems.