Overall I am not willing to pay £50 more for a chip which offers minimal changes. PCI 3.0 is useless to me until way after haswell as I won't be changing this system to PCI 3.0 GPUs ever, never mind the fact that there is barely any difference yet. SB is worth the £200+ for 2600k's but £240 + for IB, not a chance. I've 100% made my mind up now and think IB is for people who want the future features which I will never need on this board/CPU