For the OP, as you can see lots of folks have their favorite routes, but the biggest takeaway I hope you get is that you need to have more than one route planned. I do this trip (Virginia to AZ/CA) at least once or twice a year. Every time I prep for the trip, I have 3 routes planned. The route via ABQ is generally my favorite, but I honestly don't know which route I'll go until a day or two before I depart and that is due to weather…..so first rule of coast to coast GA travel is to be flexible.
Another thing to keep in mind is that while lots of folks like to put emphasis on crossing the Rockies, in my experience the biggest driving factor in this trip is what the weather is doing on the east side of the Rockies. That is where the fronts start to get nasty, so always monitor the big picture and not just the weather on the leg immediately ahead of you.