Wanted: Wheel building stand

Using my unique "it's really expensive so it must be good" criteria this one looks nice:

However I'm not spending that money on one!

What features are essential in a good stand?
I (fairly obviously) don't know what to look for so all help appreciated.

ive got one of these, and its a lot sturdier than the cyclo/var equivilent, also has the capability of being able to work with 150mm ubs for donhill bikes, and 20mm axles