I did a run from Marysville, CA to Florida (moving truck). Jumped down to I-40, turned left until I got to Memphis, TN, then angled down to Atlanta, Ga (had to visit a buddy) and to Florida after that.
I've been on I-10 a couple of times Florida to Ca, I-20 Ga to Tx quite a few.
Of the choices, I would use I-40 over the other two. I-10 is borrrring and I-20, if I rememeber right you end up needing to use I-10