Dillo, I believe the first spider, the long legged black one in the first picture is the Latrodectus mactans or Southern Widow. To quote Wikipedia "The injection of venom from these species is a comparatively dangerous or lethal bite." Not one you really want to mess with.
The second one looks like a wolf spider, probably of the family Lycosidae. Pretty harmless
I currently have a female Southern Widow who made an eggsac for me yesterday. Sometimes you're just lucky I guess.