After going through a whole bunch of different combo's of rental locations, companies, and discount codes I ended up just bidding on Priceline and was really happy with what I ended up with:

I got a midsize/intermediate, to be picked up at the airport (convenient), for 7 days starting next Tuesday for a total of $261.09. This resulted from a bid of $25 per day plus all the taxes and add-ons. If you're not too fussy about the company or the actual car this seemed like a great way to do it.