Most pasta has a medium-to-low GI. And with all these great tasting whole grain pasta varieties, it's easy to find one which is both nutritious and great tasting.
Most rice are high GI.
Brown rice being an exception, but still not as low as whole-grain pasta.
Brown rice is very nutritious though.
But avoid white rice.
-Hedge
I'm always touting this stuff on the board, but if you can get it where you are - Barilla Plus, which is high protein (complete proteins, I believe from egg whites in part), high fiber.
On white rice, obviously it has pwo applications (don't be afraid to down some sushi pwo, nice combo of easily assimilated protein and high glycemic carbs). Otherwise, Hedge is right, avoid.
One final note, rice (brown or white) and pastas (even the good ones) are extremely carb and calorie dense. The rule on these is Proportions, Proportions, Proportions (i.e., small amounts- use a scale, measuring cup whatever, don't make more than you need-which is a BIG mistake).