Actually, the most venomous spider is the Brazilian Wandering Spider. I watched a documentary about them and it's said they can kill a grown man in 6 hours if anti-venom isn't applied to the one being bitten in time.
Great shot! I noticed that these guys do not have the iridescent "lamulae" that true tarantulas have(yeah, I know that they aren't tarantulas, but they are Mygalamorphs). Those fangs are even more impressive though, than on my largest T's!