DD4 2011 build? is it worth it

are the 2011-3 and dd4 worth going to now? will i notice a big difference in performance or should i just stick with 4790k and dd3

No, it is not worth it if you have a 4790K.

Unless you absolutely NEED those 16 or 12 threads for a powerful work station there should be no reason to get on the 2011-3 platform. Unless you got money to blow for no reason.