I know nothing about computers, yet I need to buy a new computer for my office for trading but due to my lack of computer expertise, I'll be buying a pre-built computer. I'm located in Canada and I'd rather buy the computer at a store rather than buy online. I'm a very active trader so I need something relatively fast. I have quite a few programs open at the same time, however, I don't do too much intense charting, but everything must run in a very smooth manner. I also need the computer to support atleast 3 monitors. What pre-made computer do you guys recommend and where should I get it?