Bee Gees first 3 lps reissued

Anybody point me in a direction to obtain these?...Never been a fan of the Atco sound...are these a marked improvement?
I own this set and the whole package is superb. When I originally bought the LPs, I had a $200 stereo set so I don't have a good reference for comparison. If you're a Bee Gees fan you'll love the alternate mixes as well as the excellent booklet that comes with the set.