Street Fighter 3 Third Strike
I know that game is already in compatibility list as playable, but i found very interesting thing - when you play in 640x480, you see tons of layer issues. But when you switch to 1280x1024 fullscreen, they disappear! Also remember to use Z-Write and AlphaTest Z-Write + Capcom Hack. Some really tiny graphical bugs appears, but they're not important.
However framerate is for me low (~60 fps in menu; ~40 fps ingame) and some sounds effects are missing.