Well phibrizo, i dont think youll need to go to the C IV, ASUS will release a new BIOS within a week that will sort out all the issues. They are pretty good with that.
Also, Unless you are just after the bragging rights, there is really no point for any of us to go to the C IV, performance wise, they are pretty much exactly on par. I posted a link in the C IV thread with benchmarks between the C IV and the 790FX GD70 and they are on par. so its a bit of a waste of money for the very few extras you get. you can say you want it for SATA 6, SSD's are not even reaching the limit of SATA 3, You cant say for USB 3, as the devices are sooo scarce and it a bit pointless at the moment, as far as OCing goes, you might have a case but i would say, not more that 10% better than ours, so if you can justify $200 to $300 for 10% more OC then go for it. As for the quad PCI-E slots, you are wasting your time, youll get a good bump going from 1 card to 2, but crossfire doesnt handle scaling that well, so your third card will be a slight increase, and your 4th, youll hardly notice in benchmarks, never mind real life.