Why not download the free trial and give it a whirl for 30 days? with regard to Zbrush it is a little different in its thinking, but after a day of using you'll get it. And it is powerful. Besides how many games and vfx studios can be wrong? If you want a quick comparison, I used mudbox and found it sluggish even on 64 bit Linux. Also it would fall over after a division of 12 million polys Zbrush went on to 15 on the same model before doing the same Jay