Musical Fidelity a3 vs 3.2 and cd-pre cd players

can anyone explain the specific differences between these three cd players each? Each unitilizes 24/96 upsampling. The spec comparison between a3 and the 3.2 are very close. The cd-pre uses the nu-vista circuit. Is the 3.2 closer to the a3 or the cd-pre?
I have the A3 CD and find it lacks a little sparkle and isn't as firm on the bottom end as I'd like but is otherwise a decent player. The A3.2 uses better DAC's and is said to be a much better player although I haven't heard this for myself. I believe the CD-PRE is supposed to have a CD player very similar to that of the A3.2.