Reduce road noise: Floor or Doors?

[Crackerballer]

OK, so I am on a mission to make my car a bit better all around. By a bit better, I mean lowering it to add some MPGs, adding light wheels and good tires to improve the ride, a good alignment, etc.

I also want to start to reduce some of the road noise. I spent most of the day at work reading about sound dampening. I decided I would use RaamMat and Ensolite since it is cost effective. But I want to do this in small chunks, so here is my question:

If you had to do just one, either the 4 doors or the entire floor, which would you do first to help reduce road noise? I eventually plan on doing both, include the trunk and lid, but I want the most impact first. I have look through Derick's thread and SQLs and they do a good job of showing the install, but I haven't found anyone that says they have done it for road noise. Thanks YW.