It really doesn't look like either Brachypelma vagans or Sericopelma rubronitens. I wouldn't rule out Brachypelma vagans completely though. I agree looks more like a Pamphobeteus or Lasiodora spp. More Pamphobeteus though.
Probably a Phormictopus sp. No arrowhead shaped irridescence on the caput so , to me, that rules out Pamphobeteus. Has more of a purple sheen than any "red-rump" I've seen (but color means nothing so.....), the setae on the abdomen remind me of Phormictopus, and the general body structure just doesn't seem to fit anything but Phormictopus to me.