Nice you can take some time on this trip. Seems like your stops are mainly cities. Might you be interested in some recommendations for scenic stops along the way?:
Of course west of Little Rock you have Hot Springs and Lake Ouachita (great COE and SP CG's around this lake). Or go further north up to Eureka for a nice romantic little town. Pea Ridge NMP is also in that area, along with the FREE Crystal Bridges Museum.
Not far west of Oklahoma City is Red Rock Canyon SP., maybe 5 miles south of I-40. Nice little CG in a canyon as the name suggests. Even for someone who's been to the red rock country of the southwest, I would return there again.
I would choose Santa Fe over Albuquerque. Lots to see and do in and around there.
One spot that trailertraveler mentioned that I have to give another strong recommendation for is El Moro NM. Went there for the first time a few years ago and was amazed. Well worth taking a day trip west from Albuquerque.
I assume your Pecos placeholder is so you can visit Carlsbad Caverns, NM and/or Big Bend NP. Both are worth the time. Big Bend is big enough to warrant several days.
For Houston, I'd stick to the southern part. Johnson Space Center. San Jacinto Monument. Galveston. Otherwise Houston is just a big huge city with lots and lots of traffic.
Safe travels. Lots of traffic in many of the places you've listed.