I think it all depends on who you talk to and your own personal experience. I will soon buy a new computer myself. I have been doing some research and so far I like EZ Trading Computers. I had a very good conversation with Eddie. He is also a trader, so it was easy to communicate with him...
Make sure you get set up with a good computer system. There is a free guide that offers advice on what to look for: http://tradingcomputersnow.com/free-guide/