Building a High-end to Mid-end PC

CPU i would say Intel I5 3570k or a AMD FX 8350

All depends on what you want in your system tho and i would recommend googling look at reviews ya know

MY motto dont bite the bullet by rushing do yourself some looking

I think you'll save some coin and have more to play with with the AMD set up. If not messing with your OC and getting the better benchmarks are more to your style then i5 and then you'll need to choose 2nd, 3rd or brand new today 4th gen i5. This isn't to say the AMD isn't a fantastic chip and an absolute mad dog for gaming and programs.

Most games today are much more GPU oriented than Cpu. Almost any 4 core CPU will be more than sufficient. I'm not sure of a game out which will use all 4 cores. Concentrate on a good 4 core CPU and spend the money on the best GPU you can afford. Whatever you are seriously considering, find it on Newegg and spend the time to read user feedback. The time you spend will be well worth it. That goes for every component you buy. Don't try to save money on the PSU. It runs your whole system. Newegg is the best place to do research online no matter where you buy it from. As has been said here, the most important thing to do is research.
Other resorces that may be useful PassMark Intel vs AMD CPU Benchmarks - High End
PassMark Software - Video Card Benchmarks - High End Video Cards

Look here:
ASRock > 990FX Extreme9

It is the first FX in the list.

ASRock is really making waves and rocking ASUS's and MSI's world. I'm still a MSI fan but it would seem that many have had voltage limit issues when trying for the max OC's. The ASUS and ASRock will perform better in that 9/10ths-10/10ths OC situation. The board I recommended and above is crazy !
In the end the last call is your's and I would look for expand-ability and features then value. Have you set a budget for the mobo?