Have been trying out Synthmaster and Zebra for the last few days and enjoying both. They both have super amounts of options and great sound.
Also I have spent quite a bit of time with U-he Tyrell N6 and must say for me it is the best free soft synth out there.
Bitflippers thread really got me curious and pushed me further in my synth journey.
http://forum.cakewalk.com/My-longestever-shopping-quest-finally-concluded-m2859550.aspx I like the visual feedback on Synthmaster as it helps me see the effect of my adjustments and so has helped be grasp things a lot quicker.
Zebra 2 has a lovely sound and has a lot more free presets and information across the web.
As it stands still finding the "grit" mentioned above with Z3ta 2 a real pain. I like the layout and potential but for me getting the sound I like does notcome as easy as with other synths I have tried.
Where I have got to now is that I will be buying Zebra 2 in the future when funds permit as it is an amazing synth. With clear development plans and large resource base. Tyrell has also confirmed this for me as it is also a great product.
Really tempted with the current Synthmaster deal as I have enjoyed learning on it and found it quite intuitive after the initial learning of the layout. Only $65 to get the foot in the door.
We shall see 3 weeks to decide!