Ooof! I believe that an enhanced Nord 3 (whether its called the Nord 3x or the Nord 4, who knows) will be released some time after the 2X. I read this in a Sound on Sound artcle.
The guy who posted a nice Nord Lead 2 demo on YouTube responded to a similar question and I think he stated he preferred the 2 over the 2x as it sounded more "dirty" and analogueish. The 2X is purported to have a cleaner sound. I don't know if that is Clavia's intent on the successor to the NL3.
I'd buy the NL3, it's the best bang for your buck for sure. Just my .02.
