So, my local gaming store has Gamescience dice in stock. Their pitch is precision.
Which is why, when you buy a set, you get free use of a marker to fill in the numbers, and free use of a file to remove the burr from the injection moulding.
Also, their d6s are interesting. Not only are they left-handed, they're spindown. The 3 and 4 are adjacent. This really upset Michael - he has a serious thing about a dn's opposing faces summing to n+1.
However, the d4s are numbered correctly (base numbering) and clipped to avoid horribly sharp corners, the d10s have had to be clipped so they can't be used as shuriken, and they are very nice looking dice.
But they're not precise.