No blind tests, but I have a lot of feedback from customers that iTunes rips are not as good as a ripper that uses Accurate-Rip, such as XLD. I have heard it myself too.
Accurate-Rip uses the FREEDB database of rips that also includes accurate offset info for each track.
Try XLD:
http://tmkk.pv.land.to/xld/index_e.html
I would highly recommend using ripper with Accurate-Rip and C2 correction, XLD or Maxx for Mac and dbpoweramp for windows. The CDROM drive should have C2 error correction capability. If you dont, you will end-up re-ripping everything when you realize how bad the SQ is with iTunes.
Steve N.
Empirical Audio