The 7-string sets often have .70s or around there, so you could buy those instead of Zakk Wylde stuff.
Of course, then you'd end up with an extra string.
I'm definitely not "committed to" NST, since only one of my guitars is currently using it, but we'll see how that progresses as I get familiar with it.
Maybe I should be... committed, that is.
Post-Thrak thoughts: The ConstruKction of Light = not bad but it's got some weak tunes; The Power to Believe = awesome.