Not going to lie I skimmed this thread after the first few posts, and I will reiterate that what Im about to say does not reflect a recommendation nor is it the community norm, but if your afraid of 1.6V on a BD/PD architecture chip and are still craving more speed you need to take the kid gloves off and tell your hardware what you actually want it to do. Im not here to argue what various speeds will have what advantages as IMO that is left up to the individual user, but I saw alot of senseless bickering about what frequencies are worth pushing, and if you ask me they are all worth pushing if you feel that there is a benefit to doing so, but dont come crying to me if it doesn't work out how you thought it would.
Now I will say that far to many people are way to complacent about temps and voltages on these chips. Trust me when I say they will take alot more than you wish to accept they can. If you doubt that I know what im talking about look through some of the links in my sig or my results on the bot.