I'm still running a 560ti, but looking to upgrade to a GTX 1070 so I know any one will give me much better performance. There is a wide spread of prices and I'm unclear over what the extra money gives you, if it is just flashing LED's then I'm not interested. Are the blower fans really much louder than the other cards? What would be the best value under £400 if I don't care how it looks and don't intend to overclock?