What you didn't consider was I am building a new rig so to me £100 isn't really the issue. As for coming from a Phenom set up for the extra performance, if there is any outside of highly multi threaded apps, then the cost for a little more seems to make even less sense. So a small upgrade on the same platform doesn't make sense, neither does switching from an existing platform like i7 or top end i5 which only leaves those considering new rigs or big upgrades.
With that in mind I stand by my £100 difference not really being a deal breaker
Oh and arknor there are loads of people on here that spend much more than this on a new rig and £1600 every 6yrs or so isn't too bad in my mind