I'm a very big fan of silverstone cases, but i never really liked their Sugo series, part of it is some of them use proprietary or sfx PSU, so upgrading or even changing for a less noisy setup is most of the time out of the equation.
If i were to build a m ITX setup today, my choice would be Fractal Design Node 304
, its design is similar to sugo, but uses a standard ATX PSU, this allows even high end aircooler inside the case (depends a lot into the design of the cpu socket on the mini itx motherboard), but you can fit a tower cooler easily, even twin towers like the silver arrow
. The case can fit 6x 3.5hdd or 4 if you use a dedicated GPU. For the PSU and the style of the case, i like Seasonic G360 or if you need more power Seasonic G550/650, this are psu that will start upon powering the pc, i prefer this specially for the placement of the psu that wont get any air from the case fans, so this kinda psu will be working full time (not noisy in my experience with G550). If you wish to read more or check out some builds, look into Fractal Design Node 304 Owners Club