Cases and AIO support

[MoonFooy]

After 4 years of having my current pc, im looking to build a new one. I have all my parts picked out,( at least most of them), but i have a few issues/concerns. 

One of these concerns being the case, in the build i have went with the corsair crystal 570x rgb (black and red). and the issue that im having with it, is that i wanted to put a 280mm rad, the h115i in this build but the case only supports 280mm rads on the front, and i wanted to keep the 3 fans on the front because of the great airflow that it allows. So what i'm asking is, is there a better AIO cooler that i could get that will fit on the top, or would all i need to do is get smaller fans for it.

Second question kind of contradicts the previous concern, and that is, is this case even worth it. I want a high end case under $350 preferably, with a psu shroud and full tempered glass side panel(mid tower or atx). I've looked at the h700i by nzxt but i'm not a fan of the CAM software that i would need. I also would like the it to fit 280mm rads, on front or top as longa as the front does not have essential cooling as the crystal.

side note- I do plan on overclocking the 8700k to at least 4.7. 

Any case suggestions and AIO cooling is greatly appreciated. 

My build- https://ca.pcpartpicker.com/user/moonfooy/saved/CpW4CJ