From Wacom
Intuos5 is now known as Intuos Pro.
bamboo is now known as Intuos.

got it for photoshop.
My first Wacom was the 1998 Intuos [GD] tablet 12x12.
with pen but there wasn't much diffrence between that pen and a mouse.
This was around the zBrush 1.55b days .
zBrush was around $50.00 ,$75.00.
LOTR & displacement maps wasn't till around zBrush 3 ,I think.

I know ya can do alot in zBrush.that ya do in any app.
But the scupting meshes like this Monster that can only be done in zBrush ,Mudbox.
Pressure Levels _ 2048, both pen tip and eraser
Tilt Recognition _   ±60 levels
wouldn't hurt

all those 0's on the mouse is why even on pixologic Minimum System Requirements:
they list.
Pen Tablet: Wacom or Wacom compatible.
http://pixologic.com/zbrush/system/

Mouse
Pressure Levels _ 0
Tilt Recognition _  0

Wacom graphire4
Pressure Levels _ 512 thats 1536 less then Intuos Pro
Tilt Recognition _  0

Wacom Intuos.
Pressure Levels _ 1024 thats 1024 less then Intuos Pro
Tilt Recognition _   0 

if you ask on the zBrush forums .they recommend Intuos Pro at least Medium ,Cintiq

Wacom Intuos Pro.
Pressure Levels _ 2048, both pen tip and eraser
Tilt Recognition _   ±60 levels

Wacom Cintiq
Pressure Levels _ 2048, both pen tip and eraser
Tilt Recognition _   ±60 levels

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The Artist that will fight for decades to conquer their media.
Even if you never know their name ,your know their Art.
Dark Sphere Mage Vengeance