Dallas to Amarillo

[rjohnsonnm]

I am going from Dallas to Amarillo in another week or so and am wondering about the roads. There's 2 main ways to get there but I'm wondering which route is best. Has anyone been on I-40 from Oklahoma City to Amarillo lately? If so, how is the road? I went that way several years ago and the concrete road just about destroyed my RV. I am also thinking about Hwy 287 through Witchita Falls if I-40 is still bad. The map shows 4-lane highway but not controlled access. I have a bad right knee and try to use cruise control as much as possible. Is Hwy 287 a small town "stop & go" road the whole way where cruise control is not feasible? Thanks for any feedback.
Ron