Having it be dedicated is a huge plus. You probably know this, but it was have to be 64-bit to have more than 3.2 GBs of RAM. Get an SSD.
This topic comes up over and over. It all depends on what you want to do. It always kills me that users talk like AC will be the only program or database they will run.
One of my favorite quotes comes from my network IT specialist I use. I asked him why he never works on peer-to-peer. His answer. It's way too difficult.
Client/Server debatable. Client\Small Business Server (domain)is awesome.
