I pull a heavier, 11,300lb loaded, 5er with a 2014 F250 4X4 SBCC 6.2 3.73.
I'm not in love with the performance, but it's not bad. On moderate hilly interstates I get passed more than I pass, but part of that is that I don't drive it like it's on fire which is the same way I'd drive a Diesel. I keep up with the semi traffic for sure, and pass some of it. No burning urge to fork over the money to go Diesel, but everybody has different driving environments. We don't have many mountains close, so that could be an issue.
With the 4.30 and lighter trailer you should be happy, and just from personal preference I think you'll like what the 5er gives you in room and towing behavior.
I pull a gooseneck cattle trailer with the truck that generally runs 8,000 pounds or so. Smaller frontal area, but it handles that much better than the 5er at highway speeds.
