Same here, took 3 weeks for a replacement and the replacement was noisy still, just without a ticking noise, but do realise that these are very well priced and xfx don't make the fans. I won't talk about OCUK.....ok, i will, I called them and told them about the second unit being loud, and the guy talked to me like i'm daft or something and never offered a replacement.
xxx edition should be better as they have a quieter fan installed.
the Corsairs are priced higher, so i'd say risk it with an xfx xxx and use DSR if it's faulty, DON'T be fobbed off with a replacement
+ go with the 3570k, why are you asking advice and then not accepting it for he sake of <£10 ?
i wasent asking for advice i was showing everyone the rig too see what they thought not what to change