Just purchased a few synth plug ins for kontakt from synthmagic.com.
Great emulations of Crumar, Farfisa polychromed, Elka Soloist and Prophet VS to name a few. They are very affordable and sound good!.
Im not affiliated with synthmagic at all so this isnt a biased opinion. Check out their soundclips, pretty good stuff.
Reason 7, Elektronika EM 25, Korg EX-800, Arturia V-Collection, Komplete 9, G Force String Machine,