Being a gaming PC, I would consider upgrading the GPU to something like a 7850 as you will be able to go a little longer before needing to upgrade.
The second thing I would consider would be upgrading to RAM to 8GB with another 4GB stick. 4GB should be fine for now, but I think in roughly 2 years, it won't be enough for mainstream titles.
Also, unless you have a specific need, I would ditch the blu-ray drive as it costs about $40 more than a regular dvd writer. It will also give you more cash to spend on a GPU.