There are so many angles you can go with a new rig these days. It all depends on what you want to do on it mostly. Games, video/photo editing, (pron) etc. With most mid level cpus will handle just about any game out there and with a decent video card will get you playable frame rates with mid levels of graphics. If eye candy is what you want then in my opinion spend the bulk of your money on the best video card you can afford. With that being said also. AMD will give you the most bang for your buck in my opinion again. Yes most Intes chips will blow even the most expensive AMD chips out of the water. But if twice the cpu speed doesn't give you but 5 to 10 fps then its is not worth the cost. Also make sure you get a power supply that is quality. There are some really cheap power supplies that come on the build it yourself kits that are junk even if it says 1400w on the sticker. I myself bought a amd fx-8120 16 gig ram and a 6950 videocard and a gigabyte 970 mobo. All but the video card were a steal in my opinion. I don't have any problem running anything. Here are a few sites to get you started. I sure many people will have better info than me. Best of luck. I'll be glad to help any way I can.
http://www.tomshardware.com/system-configuration-recommendation-51.html
http://www.tomshardware.com/reviews/build-your-own-budget-amd-pc,3807.html
http://lifehacker.com/5840963/the-best-pcs-you-can-build-for-600-and-1200
http://www.maximumpc.com/build_pc_recommended_builds_april_2014