I've always wanted to play those games, sadly my PS2 is all but bricked, having a massive input delay with the controllers so buying them is out of the question. I spent most of last week toying with emulators but ultimately got more frustration than joy from them, especially PS2/Gamecube emulators being full of errors and having insane framerate issues despite my PC being more in line with the technology in the current gen consoles.
If those games got a rerelease on PC I would buy them, but personally I don't care about HD rereleases because if the games are released on PC, you can make them higher definition usually if they are at least adequately ported to PC. That was the one cool thing about the emulators I toyed with, when I did get something to work it looked really good. Anti-aliasing options, fully rendering textures, and removing draw distance fog can make old games look just fine for me, even horribly ugly early 3D games look fine with some tweaks so I would just like the games to be available.