Quite simply, the rig with the best GPU will be better in most conventional games. CPU gains in gaming are negligible, especially considering that all proposed choices are good enough pieces of kit. The overclock is hands-down better with intel chips this round, but the added benefit when it comes to gaming is debatable.
However, I would lean slightly towards AMD this round for the future compatibility. Hyperthreading, the best argument for getting an intel chip is largely moot when it comes to gaming and while it would be logical to expect it to start making a difference sometime in the future, I assure you it won't be before you can drop in the next gen AMD chip in your rig and save literally hundreds on the mobo and the CPU itself to buy the best GPU available at the time. Overall it just makes much more sense.
- Ordokai