Laptop or desktop? Price range?
My advice to most people is, build it yourself! Find deals on every individual part and save lots of money while getting a better overall computer!
If that's not up your alley, my advice would be to be patient and try to find computer deals on sites like slickdeals/newegg. You're going to want to look for something with an SSD and decent processor (although pretty much anything can be used for turking, this will save you some pain.)