Definitely get a SFX and not SFX-L or ATX power supply if you can, if you're inclined to smaller ITX builds. I'm extremely happy with my SFX Corsair SF450 inside Sugo SG13B.
Reminder, a normal 7700/1080 ti build can fit comfortably in 450Watts. FYI, SF450
is 80 Plus Gold rated, so lazy math, it gives 450W to PC but would be pulling 517W from wall.
There are overclocking CPU/GPU scenarios where that's not enough. Those last few FPS/% points increase power usage massively. Not that i ever came close with gtx 1060/i3-6300/6x2.5" drives plus one 140mm case fan. Ive never seen the PSUs fan come on
I did hate the SATA drive cable though. But, i've been making my own power cables for cleaner build since almost beginning. So keep that in mind.
edit: almost forgot, only get silverstone pp08 sfx-atx adapter(same as Kingwin KWI-SA-08) if you need one. vents, adds more CPU cooler clearance if its that type of case.