I am planning on buying a SM560 from Density.
I just have one little question about the side panels, can we swap them from gpu side to cpu side ?
Yes sir, panels can be moved to either side or even to an SM550.
First i said - finally ...
Then i went and see prices , so, the SM570 went from 260 USD to 337 USD . Damn ...
Shipping to EU from us would be $50~$70, and then 19% VAT + import fees on top of $260 + shipping, it comes out to a reasonable savings.
Will the C14S Noctua fit in SM580?
As count said, no, the SM580 is designed for using liquid coolers.
However if you do need a larger heatsink I would recommend the ID Cooling IS-60, it's the biggest one that will fit. It does require a vented side panel and possibly changing the fan / screws on the heatsink if it rubs on your panel.
If you are trying to put some HDDs in the top you can use the 92mm AIO in the bottom front, or if you only need 2x 3.5" HDD you can put two in the bottom and still use a 240mm or some 280mm AIOs in the top!