I purchased the Waves versions of the Fairchild just because I wanted to get “as native as possible” in the future… Though I love the Classic Compressor Collection (Waves, 1176 etc) a lot I never get used to the Pultecs and Fairchilds - I prefer the UAD versions here. I do not know why, I am just getting the results I need with the UAD versions, with the Waves not. Maybe this is a matter of “how used” you are to the plugin…
During those “sales” periods you can get those waves versions that cheap that they are no brainer…
I purchased the new version (for UAD2) during the XMass sales - though my oppinion was NOT to spend any more money for DSP stuff… But well… it just sounds good…