I assume you mean a 2000 points card, which would get you 2 N64 games. If you like the Mario games, then Super Mario 64 (1000 points) is a definite. I can't recommend anything to anyone without adding a shameless plug for my favorite game of all-time, The Legend of Zelda: A Link to the Past (SNES; 800 points).
The Internet Channel is not worth the 500 points; steer clear of it. It isn't essential. You might want to save your points for the WiiWare games that will be out later this spring. Strong Bad's Cool Game For Attractive People is one that I plan to get.
Here's a list of the VC titles out right now:
http://en.wikipedia.org/wiki/List_of...(North_America)