Might I interest you in my laptop. It's a year old now but it probably has about 3 month use time. Used it for dual boxing here and there and that was it. Never left my house so it's still in pristine condition.
According to your preference, you will want a quad core and definitely 16gb ram or higher.
i7 quad 16gb 1.5tb 17.3in gtx 675m + accessories (GOOD DEAL!)