(Note from Moderator, Oct 25, 2012)
Be careful to watch the dates for the posts on this thread--they start back from 2006! Much of what is written still applies but not the later posts.
[edited from support email]
We are in the process of setting up a new lab and are purchasing a small army of new computers. Presuming we will be running many experiments using both MediaLab and DirectRT, do you have recommendations regarding what we should buy in terms of hardware? Many experiments will involve simple questionnaires but some will involve extensive video and audio.