As a 3D card, the Parhelia sucks badly compared the the 9700/GF4/GFFX. But if you're seriously into 2D Editing using multiple monitors, then the Parhelia rocks.
So in conclusion:
Parhelia + 3D Games/Applications = BAD! :disgust:
Parhelia + Multi-Monitor 2D Editing = GOOD! 🙂
Parhelia + Anything Else = Uh, Mediocre? 😉