If you are upgrading the brake size with the BMC it will be quite hard to lock up the big brakes in general, and even if you manage to do so, you'll be stopping pretty damn quickly regardless due to them. I would also suggest driving more cautiously for the first week of a new brake setup so that you get used to the feel of it, because that will impact you in regards to not locking up more than ABS ever will.
tl;dr do a brake upgrade with the BMC upgrade. If you already have the brake upgrade, get the 1" booster and learn the new feel of your pedal over time.