Maybe you have plans to build an astroserver to control your equipment. One thing to figure out is how fast computer do you need. Too fast and it take more power then necesary (my computer is battery operated), to slow and it will not work properly.
I have made a table over the CPU loads on my Astroserver during different work:
http://www.astrofriend.eu/astronomy/...-cpu-load.html
Maybe it could be to some help for you.
/Lars