Of course, keep in mind that variegated cultivars may not have as much vigor, because they have less chlorophyll, and might not be able to grow as fast or recover from damage as easily.
I don't want to bust anyone's bubble, but I've never really understood what all the excitement is about when it comes to variegated cultivars. To me they look a bit sickly. Personally, I prefer the look of non-variegated, but that's just me.
But if you want to count variegated cultivars are rare, for a collector, I suppose that counts too.