Aaah.
I'm not familiar with XP games myself, but you could always check out in reviews if you feel they're worth the effort?
a feature that allows you to read user-made reviews on each game, so that may help you decide, if you want. Just search for each game and look under reviews if there's anything. (it's not infallible but better than going in blind).
As for Rm2000...there are a lot of good old "rm classics" in there (heck, Ib alone is well worth the installation if you ask me). Check em out in RMN to see, I guess.
You can also just go to RMN and search for "high rated games" and see if there's anything that looks appealing/has good reviews.
Still want more games?
Vagabond (somewhat flawed, but very simple and engaging exploration with solid rpg elements)
Chain of Retribution (can be a bit uneven in parts since it's a chain game (made one chapter at a time by different people), but still pretty nice. (Also the title is a fake, the game is nowhere near as melancholic as it sounds, it's pretty comedic)
God of Crawling Eyes (Short and simple horror game, not a rpg, it's an adventure game. It's not TOO scary either.)(Tho if you WANT horror games, RM has a few very nice ones)
Can't remember anything in particular anymore.
(Not sure if I'm a grumpy old snark who doesn't like anything anymore, or if I just play too few games, or if I have **** memory XD)