I was thinking about getting the GeForce GTX 550 Ti, link on newegg below
But I was wondering if there's another GPU about the same maybe for cheaper or a one thats way better for a little more cash, Im not looking to spend ALOT of money, but Im looking for a GPU that'll last a long time, has really good performance at a good price.
drums101's reply was picture perfect, +1 to everything he said.
Although, you don't really need to overclock. That 3570k is fast enough stock that it will NOT bottleneck any of the cards in your price range. You could save a little bank not buying an aftermarket cooler, though I still would even if you don't overclock.