....and I don't know what game to spend it on. I only have a PS2 (no Cube), and currently the only games that have come to mind are :
XIII Beyond Good & Evil.
The only thing is that those are multiplatform and big name games, and I'm sort of looking to add some under-rated, unique niche games to my library (to go along with games like Rez, Silpheed, and Disaster Report.)
I wouldn't call it underrated, being as it's an awesome game, but Twisted Metal: Black is in the Greatest Hits collection and is the best car combat game I've played. My wife is enjoying Sphinx and the Cursed Mummy now.
You can download other people's created arenas if you want. I saw a Nitro one last night. And I don't think Broken Dreams is in there but in older games, you could easily add themes to the game. I bet you could do that here.