The 9700k is a 200w possible cpu on average. The 2060 super can pull 200w (yes I know official nvidia TDP is only 175w). Figure the entire rest of the pc can pull @ 100w between rgb, fans, drives, USB, Sata, whatnot.
That's 500w at max, (never happen, almost impossible to max every draw simultaneously) so at a very minimum will be a decent 500w psu (good luck with that, there aren't any I can think of).
Which for a really decent-excellent psu, a minimum of 550w for that combo, but many will go 650w just because, or the price happens to be better on sale than the 550w. Corsair RMx, Seasonic Prime or similar class psu, no worries at 550w, a Corsair CX or similar budget psu, better off with the 650w.
Cooling depends on your preferences and the case. For air a Noctua NH-U12A or bigger, beQuiet Darkrock 4 or bigger, basically anything in the 220w+ class of cooler is going to be peachy decent with temps and noise. If that's not your bag, there's always the aios, a decent 240mm will work, a decent 280mm will work better and any 360mm won't be an issue.
But that all depends on exactly how much clearance your case has for an aircooler OR exactly which radiator sizes your case can fit.
With aircooling, just don't forget to add in extra fans, the case normally (unless it's a snazzy RGB/ARGB specific case) will usually come with just 2 case fans, and thats entirely insufficient to be honest.
First and foremost, decide what type of cooling you want to use, liquid and air are basically the same ability at 250w or under, it's all liquid at 250w+.
Once you decide on type, figure out prefences, for almost all 220w+ class coolers a minimum of 160mm of clearance in any case. For aios a 240mm will fit in a 360mm (both use 120mm fans) and most 280mm cases will also fit a 240mm (couple extra holes). So preference.
That sets up minimums, 160mm air, 360/280mm liquid. Use PCPartPicker, and start shopping for 10-15 or more cases you really like the looks of. Nix the ones that simply cost too much. Research the cooler fitment, even if you have to go searching websites for the case specs. Nix any that don't meet the criteria of clearances.
You might end up with 4 or 5 (maybe less) that meet cooler needs and you really like the look of and are in budget. Then get picky about the stupid stuff like where the connectors are in front or too much plastic or reviews say it's flimsy etc. You'll end up with 1 or 2 that fit all your needs/wants. Pick the one that's better for you.
Then go get a cooler to fit, the psu to power and you are in business.