If you are looking to belong to the company that makes the fastest CPUs in the World - you can go Intel, however, will you be buying the fastest CPU?
If you are in the market for the average CPU, not the high end, then AMD is your best bet. They will always have a the best mid-range CPUs for much more affordable price than Intel.
People keep comparing AMD and Intel on who got THE fastest CPU, but people rarely buy really expensive CPUs, 90%, if not more, shop for an average, best bang for budget CPU, which is usually in the range of 100-300$, in which AMD and Intel are quite close, with AMD taking the lead in having quad cores that are significantly cheaper.
Yes, 2500k beats 955 X4 quad from AMD, but I can get AMD quad for 110$ while the cheapest 2500k would be at 220$. AMD overcloaks great and have plenty of power for gaming for years to come.
AMD mobos are also cheaper and offer better features for the buck. The socket on mobos also does not change as often as it does in Intel, and most CPUs are backwards compatible.
For gaming, you better get that 100$ and invest into the better card.