I agree with using Exact Audio Copy/LAME as well.
EAC/Lame produces a great quality ripped MP3 file. Other rippers don't have as good quality on the rips.
The only bad part about EAC is that it takes a while to rip an entire CD. The last time I tried, it took about15-20 mins on my machine to rip an entire CD (I have an Athlon XP1700+ which is pretty fargin' fast too).