Personally, I think you should be fine. My son plays BF3, Planetside and Skyrim on high settings at that sort of resolution. He has a GTX560SE, which I think is about comparable with the graphics card you have. The SSD may be overkill for a gaming rig. My only query would be whether dual core is enough to get the data to the GPU fast enough. My son upgraded from a 3-core AMD to a 4-core AMD FX at the same he upgraded the graphics card. He's seeing really good performance which he attributes in significant part to the higher bandwidth of the processor. That said, the i3 is a good part. You'll need to add W7 to that config, of course.
iMac Pro review