If you're looking for a new PC to buy, the second one is a lot better for gaming. A LOT. The 560Ti cards are stronger than the 560's and the PSU isn't overkill as in the first one. You also get a good storage drive and the CPU is a lot newer tech.
Holy crap, no way. The i7 3930K is waayy overpriced. Get a 1155 mobo plus a 2600k and a more powerful video card. Much as it pains me, based on current benchmarks I cannot really recommend the FX-8150.