My dad is a architect/drafter and he uses an old HP pentium desktop computer. He uses AutoCAD. The computer is really slow and giving him a lot of problems. He comes to me a lot with problems with his computer asking me to fix it. I just thought, he needs a Mac. Macs are easy to use and I think it wont give him anymore problems. I have narrowed it down to two Macs, a 2.26GHz Mac Mini and the 2.66GHz 20in iMac. He already has a 19in HP monitor. He cannot use his current keyboard/mouse because they use the old style connectors. So here are the two possible ways to getting him a Mac. 1. Buy the 2.26GHz Mac Mini (upgrade to 4GB of RAM and a SSD), buy an Apple Keyboard/Logitech MX Revolution, plus his HP 19in Monitor. 2. Buy the 20in 2.66GHz iMac (Upgrade to 4GB of RAM) and connect the 19in HP monitor to the iMac. Please suggest to me which one we should get him. We are on a tight budget but he really needs a new computer because he uses a computer for work.