THE BEST METHOD to run PSX games (and everything else for that matter) is via Retroarch - http://buildbot.libretro.com/nightly/
If you have any questions on how to set it up on Windows please feel free to ask, its very easy.
There aren't many PC games I'd consider playing on a couch with a large TV over a desk setup. Racing and fighters are the only genres that come to mind, maybe flight sim.
That requires effort .
It wouldn't be hard to assemble an XP machine for old problem games and easier DOS support.
But all I have setup to use atm are: 1 laptop and 1 desktop both running 7.
This leads back to lounge setup again.
Don't get me wrong, I have played PC games in the past but not for a long time now.
I'm all about console games and watching tv/movies in the lounge (which has my largest panel tv + home theatre)...occasionally I might go into the spare room to play something on older consoles via crt but that's pretty rare now.
There are some old things I still need but haven't got around to since I moved here over 10 years ago:
Decent Voodoo card.
A decent Amiga.
Maybe an Atari ST.
Would like an Apple ][ for nostalgia as I used them a lot when I was in high school.
Other stuff too (eg C64 SD loader) but tbh mainly old consoles I don't have.
Controllers are shite m8
I've thought about building a couple legacy machines but, sourcing a good CRT is problematic at best here.
I have about 6 working colour crt but I wouldn't say they're high end and definitely not large. The Mac crt is just monochrome, and I have an IBM XT green screen stashed but no pc to go with it.
Oldest PC I have is probably the 286, but after the HDD died I never got around to sorting out a replacement...I possibly have what I need but it's an odd machine in that the bios won't take a HDD larger than 40MB iirc.
Have a 386 that's fully working, at least last time I checked anyway
Have spares for a lot of the old complete stuff.