Replying to Road Trip: Miami to Los Angeles

This summer I'm going on a road trip with with a couple of my buddies from Miami to LA. So I come on here asking as to advice as to what might be some good places to stop at while on this endeavor.

The current plan is to leave Miami on June 25th, & fly back to NYC from LA early in the morning on the 4th of July.

If you guys have any experience at any of the places or routes and would like to offer up any advice on the trip, then it'd be greatly appreciated. We're interested primarily in nice towns that are scenic and have good food.

Our route as of now:

Miami ---> New Orleans
-This part of the route is about 14 hours. We will need a couple places to stop at in the meantime.

New Orleans ---> Houston
- This wont be too long of a drive, but maybe some good BBQ joints on the route might be good

Houston ---> Las Vegas
- This amounts to a total of 24 hours. Our route will go through Marfa, the Tuscon, Phoenix, and finally up to LV where we will take a little detour and stop at the Grand Canyon. Any good spots to stop at on the route would be nice.

Las Vegas ---> LA
- Seems like a pretty boring trip from these two places but will look to make maybe a stop.