if you want a good price to performance ratio go for AMD (CPU-wise) but if you want a relatively cold, less Energy consuming, yet powerful CPU go for intel and spend a little more.
For the GPU you should definitely go with AMD (The AMD cards are cheaper and still as good as Nvidia ones and they support Mantle and thats a huge increase in performance) but be sure you have a well ventilated case because the new AMD cards produce a massive amount of heat.