New Tech In 2014

Dear Tek Syndicate Gang, 


I was wondering what your thoughts are on DDR4, PCI Express 4.0 and such. Is it worth the wieght to build a new rig? Right now I'm running a 2500K and GTX 670 and have been wanting to upgrade. I was thinking of going with a 4670K and 780 until I learned that DDR4 and PCI Express 4.0 and the GTX 800 series were coming out next year. My main question is will DDR4 be ridiculously expensive for 8 gigs? Should i wait or Upgrade to Haswell or Ivy-Bridge E?


Thanks in advance,