Star Wars Episode III Revenge of the Sith (Xbox). Had this game on PS2 for a long time now, and I really liked it, but now I am thinking about getting it on Xbox. The PS2 version didn't run terribly, but I seem to recall it wasn't always stable, and that was something that bugged me because it looked so great when it was. Knowing it's probably going to be like that all the time when playing it on my Series X, as well as being upscaled to a higher resolution, is enough to make me think it's worth buying.
Test Drive 6 (PC). While I have this one on PS1 and I am not nearly as big on it as I am with Test Drive 5, I still want to get it on PC. I'll admit, it's mainly because someone made a Blender plugin that allows me to import the cars and tracks into it, and I happen to like what this game has. However, I do intend to give the game another chance someday and see if I can get invested in it as I did with Test Drive 5, so for no more than what it goes for, it's worth a try!
Need for Speed Porsche Unleashed (PC). I have this game on PS1, but my copy is defective, so it doesn't work. I also heard the PS1 version isn't very good either, but the PC version is. So I think I'll just get that one and give it a try. I might still get a working copy of the PS1 version just for completion's sake, though, since I still want to give it a go, but it's not as high of a priority.
Need for Speed II (PS1). I played a little bit of this game long ago, and I remember being somewhat impressed with it. However, I don't have it, and I want to get it since I like what I saw and to basically complete my collection of the classic era NFS games on the PS1 since it's the only one I am missing. I might get it again on PC if it interests me as much as it did long ago.