Okay, Bones, the right thing to do is simply put the money away and save it for when you really need. You clearly have a machine with decent specs that is operating just fine, and there is no reason to buy a new one so soon. I've had the laptop I'm using right now for 6 years, and it's my only computer. I've been saving for a new one for a while, and I'm just waiting for the new Macbook Pro's to come out.
Trust me, save it, because you may want this computer now, but if you spend the 2,000 bucks and then something else comes up that you really want, you can actually get it. Even better, if it's something you need. If something breaks, if something gets stolen, something like that.
I'm sorry if this isn't really what you want to hear, but believe me, in a day or two you're going to realize that you don't need that new computer as much as you think you do right this minute.