Here's the deal.
Most of the guys and girls at Anandtech don't take overclocking to the extremes other sites, like xtremeoverclocking, do. Hence people around here will be more conservative in their recommendations of maximum voltages.
When it comes down to it, it's personal preference. You can run your X2 at 1.55/1.6V and it's not going to last 10 years, chances are it'll last at least 3 or so (no guarantees). The probability is, if you're frequenting a forum like this you're probably not going to have you CPU for longer than 2 years anyway.
My view, i'd say run your VCore at 1.5 / 1.55V as long as your temps are fine, but that is only my view and what i'd do, many people will disagree.
Bottom Line - It's up to you but you're not going to kill anything at 1.45V for sure, well 99.9999999% sure anyway, and chances are you're not gonna kill anything at 1.55V either.