I may be getting a gaming PC soonish. My current laptop has issues with even somewhat older games games, and an overheating problem. I reckon i'll get a cheap, light and small laptop for mobile web use later to accompany a gaming PC as this current one is a tad big for that.
Anyway, i'm not sure about what i will need, what i'm looking for, as i've never had a proper gaming PC before. EDIT Like, what's the closest build from the OP what might be good fit for me?
Answering most questions from the OP:
Budget: Max 1500€-1750€? Lower is better, of course, but i'm willing to spend more if that mean's i don't have to consider any upgrades anytime soon. Country is Finland, so even lesser machines will be more expensive compared to NA prices.
Main Use: Gaming primarily, general usage.
Monitor Resolution: 1080p/60HZ? I don't think i'll care about anything higher, i'm more likely to turn effects higher than be concerned about IQ as long as i can play on native resolution. Also not sure i'll like even 1080p for general use, things like text start getting awfully small for me.
When will you build?: No deadline, though ideally i'd like to have a machine ready by the time Starcraft II Legacy of the Void is launched.
Will you be overclocking?: Nope. Not going to mess with stuff that may cause problems as i tend to have problems with computers enough as it is. Though being able to do that once the hardware starts to age is probably a bonus, before getting an upgrade?
List SPECIFIC games or applications that you MUST be able to run well: Most likely i'm looking to playing at 60FPS at 1080p, with focus on effects and other eye-candy. Depending on the game, 30FPS is acceptable, provided i can cap the game there as i detest uneven/unlocked framerates. Unlikely to be interested in the other stuff asked.
Older games: MechWarrior Online, Starcraft 2, Civ V, Skyrim, WoW, EVE Online, Dota 2, Wolfenstein New Order (finally).
Newer games, none are guarantees: Star Wars Battlefront, Fallout 4, Doom 4, Battlefleet Gothic: Armada (UE4 game, RTS), Halo Wars 2, XCOM 2
I'm likely to get a joystick as there are some older (space) flight sims i want to play. Any recommendations? Is HOTAS system recommended?
(Oh, and are there any good, newer (combat) flight sims? Space or air. Not interested in Elite

angerous and Star Citizen because reasons.)
A friend of mine recommends investing in a better CPU right away, as GPU is easier/possible to upgrade later if necessary. Reasonable?
Is Linux gaming feasible yet, or with the games i've listed? I have some reservations about Microsoft systems for various reasons, not to mention the extra expense the OS adds. Do note there are many older (even over a decade) games i'm likely to play.