The steps where not only for textured objects, They were for viewport performance boosts.
I have already stated I have used both.
Realistically... Will you even need that much extra density in your mesh? Are you really getting THAT much more detail? In the picture posted, I think its clearly over kill. Alas, it's debatable to say the least.
Regardless, Have fun with your 800 dollar software and being a grumpy pants. ;P
P.S. you should apply to be a zbrush sale rep.
P.P.S before you respond yes, I'll do the same and apply to be a blender rep lol