It's 990FX you want for any FX 8XXX CPU. You can overclock much easier on the FX chipset than the 970. If you're not overclocking at all, it's fine, no bottleneck at all.
i'm not immediately planing on overclocking, mostly due to my resent bad experience with overclocking, i'm certanly what you would call a newbie when it comes to overclocking, never the less i would prefere not to spend about 100€ worth or so in my currency on a motherboard if i won't experience any kind of bottleneck issue on the GPU or CPU with my current motherboard.
Thanks for the quick answer =)