Thats a good question and this depends on if you make the full use of it. I think it is worth it if you intend to keep up to date, the other options cost way more, and you dont gain a thing by waiting a couple of years as your only end up paying more in the long run. Cinevercity has plenty of value if you use it, and even more so for the scripts that come with it. Putting the price up, risky if r20 is not the big one many have been waiting for. I just wish they communicated more. R20 is a big one for me this year, its going to help me choose my direction firmly. What ever happens I will be using C4D for many years to come as there is nothing that offers me a better option out there considering all the variables.
Dan