I second the idea of looking at the used/refurbished market. Last year I picked up an older refurbished tablet for over $200 off the list price. (Since you’re looking for multiple ports. I don’t think my model’s a good fit for you.) Buying used is a great way to get more bang for your buck (and it’s good for the environment too.)
I wound up purchasing through VIPOutlet, and had a good experience, but their reviews aren’t universally positive. Backmarket.com vets their refurbishers, has stellar reviews, and typically offers a 12-month warranty. (I’m probably going to get my next cell phone there.) I’ve also heard good things about Swappa.com.