Yes it's true, AMD chips are not ideal for Dolphin Emulation. I currently have a FX 8350 @4.0 Ghz as my main desktop PC and it does run most games I throw at it pretty well. That being said, I also have an overclocked Intel Haswell G3258 at 4.0Ghz...and it runs every single game better than the FX 8350. I get consistently higher and more stable FPS. I'll be replacing my FX 8350 pretty soon with an i7 4790k.
So, I guess it all boils down to what you want. Personally, I wouldn't recommend the FX 8320. I would hold off a bit, save some more money, and plunk down the extra $100 - $200 and get an Intel i-series chip. If I had to do it over again, I would not have built an AMD FX system 2 years ago. At the time, I wasn't heavily into Dolphin emulation, but had I just went with the Intel to begin with, it would have accommodated my unforeseen future interests. If you're within a reasonable driving distance to a Microcenter, they currently have an i5 4670k on sale for $180...about $30 - $60 more than the FX 8320. I think the extra $60 bucks for an i5 4670k is well worth it.
So, I guess it all boils down to what you want. Personally, I wouldn't recommend the FX 8320. I would hold off a bit, save some more money, and plunk down the extra $100 - $200 and get an Intel i-series chip. If I had to do it over again, I would not have built an AMD FX system 2 years ago. At the time, I wasn't heavily into Dolphin emulation, but had I just went with the Intel to begin with, it would have accommodated my unforeseen future interests. If you're within a reasonable driving distance to a Microcenter, they currently have an i5 4670k on sale for $180...about $30 - $60 more than the FX 8320. I think the extra $60 bucks for an i5 4670k is well worth it.