I'm using the FLAC format. It looks like it's going to take about 120 gigabyte for all of the CDs.
One recent issue is that some of the newer discs have the following on their cases:
"This disk contains Copy Control technology. On some equipment, for example car CD players, playback problems may be encountered."
The Wikipedia has an entry on Copy Control. Basically it was an attempt to keep people from ripping the CDs to MP3. The only thing I can think of is... WTF?!?! Why else would I buy a CD other than to listen to it on my MP3 player?!?
Anyway, one of the CD drives I have was able to read these with a minimum of problems, so it's not tragic. But these sorts of shenanigans means I have no guilt when I download music illegally. HAAR!!!