Jon,
NM 550 from Albuquerque to Durago is a great road with 65-70mph speed limits (IIRC). Then 491 to I-70 to Hwy 6 isn't bad at all. It's mostly 2 lane, but it's pretty easy goin' and great scenery. Moves nicely on Sundays.
Moab to SLC on that route is about 5-5.5hrs (driven at 5 over posted speed limits). I can't recall the Abq. to Moab length exactly, but I think it's about 6 hrs.
Save the 200 miles, avoid Denver, and hit the smaller towns.
