Look all of those up online and see what the reviews are...I was not impressed when I did, so I ended up staying at the Marriott Courtyard about a block away from Delta HQ. A little pricier, but had free breakfast (with the military rate) and it was QUIET and comfortable.
I never saw the suggested hotels in person (only suggested because they have a shuttle to Delta HQ), but one dude in my interview class said that his room at the comfort inn (I think) sucked...loud AC, paper thin walls, old, etc.
I was happy with my choice and slept like a baby the night before my interview.
Take that for what it's worth.