couldn't you combine both?
that scissor jack table with a stepper motor instead of manual adjusting the hight?
http://www.thingiverse.com/thing:1077164
http://www.thingiverse.com/thing:925556
I haven't checked what it would cost me to print it, but shouldn't be much more than 10-20€?
I think i will try to build a peachy after i have all my fdm printer working perfectly