quality does vary slightly among diffrent cd ripping software but not by much , for most accurate extraction use exact audio copy in secure mode+right drive offsets , , theres 2 ways to get the offsets
a) you could use eac to perform offsets detection test if you own one of the reference cds thats listed in "technology" section of eac's site (must be original cds)
b) just look up your drive in this database
http://www.accuraterip.com/driveoffsets.htm or use google

heres a comparison of loseless codecs
http://wiki.hydrogenaudio.org/index....ess_comparison
wavpack seems to be the overall best