I'm a new member and really enjoy reading the post. I have learned a lot so far. This question probably has been covered before but I will ask again. I'm interested in a box that will help with towing and of course any mileage gain would be great too. I have been considering the Quad xzt with the 65hp increase or the Edge ez. Was wondering if anyone has had experience with these. Pros, cons, troubles, etc. I'm not interested in bombing the truck right now, just some minor improvements. Maybe there is a better option then one of these two boxes. I have a 05, 2500, 48re. with the only mod. is airaid filter system. Thanks in advance for any info.