I am trying to decide on the best computer purchase for our small church of 150 people.. primary use will be in the audio video department..I have had some people tell me a workstation is a better choice vs. standard pc.. I want to choose one that is upgradeable and has enough processor speed, video card and other components to begin with and to be able to expand in the future..we will be using Pro Presenter worship software.. I have looked at the Lenovo brand pc.. but I don't know where ot begin to choose a workstation and the components that would make it a better choice.. Please advise! Thank You! BD