how long you aiming to keep your system ? if its 3 years plus go with a amd 8 core. you will regret going with a 6 core now in a few years.
on low budget just get a £50 mobo 16 gb ddr4 3000 or 3200 for £50 and a 2600.
I'm curious as to why people keep saying getting a CPU with 6 cores and 12 threads will result in regretting the purchase in a few years time. There's not much around at the moment that utilise quad-core CPUs to their full potential. Many games don't properly support multi-core properly. Sure, if you've got some specific applications that utilise multiple cores and threads, that's great and the more the better, but for most gamers and users, 6 cores and 12 threads is perfect and likely will be for at least four to five years I daresay.