Doesn't seem like anyone ever answered this question for you. So I'll give it a shot.
I've been looking around for the best deal as well. Someone mentioned a while back to subscribe to the mousesavers.com newsletter. They offer discounted tickets for the theme parks through undercovertourist.com. Once you get the newsletter, there is a link to undercovertourist.com. They offer those who subscribe to the newsletter, better discounts then if you went through them directly.
Even if you don't subscribe to the newsletter, you can still go to undercovertourist to get cheaper tickets for Universal. The price you see includes all taxes and free shipping. The price you see on Universal is the price without taxes and shipping.
Hope this helps. PM if you have any questions.