I need a decent Case for less than 4k strictly.
I need transparent side window
Good Cable management
ATX support
Bump.
Then get CM Elite 430 or 431.
No cable management at all on either of them
get NZXT GAMMA for cable management and then MOD it.
or take NZXT GUARDIAN @ 4.8K
No experience with modding don't wanna try it
Look at some lancool cases, they have transparent side panel and are easily available under your budget. Like the pc k58w.