reaktor is not worth learning for the magority of people. yes it is rediculously powerful, but then learning C++ and the VST API is even more so, yet it really is like shooting a mosquito with a bazooka. i toiled for about a year with the program and whilst i found it technically intersting in the beginning, eventually it was just too cumbersome to be of any real creative use. one idea i'm still keen on doing is creating a cross fading mixer which fades in bands rather than just the entire signal. i'm also keen on working on my own side chaining compressor, though I'm not sure how I'll approach that one just yet. if you're into wild stuff like that then yeah, it may be worth a poke around, but if you're still learning the basics of synthesis, then you're really wasting your time.