I'm a fan of the first Cisco exit myself, for maximum "we're not in Denver anymore" effect. They both work.
Hey Bryan when you hit Denver get your radio on the Colorado Connection.. 145.310 you'll hit from probably 100 miles out on tuesday, all the way to Eisenhower tunnel on Wednesday. here's the full list of repeaters http://www.colcon.org/repeaters.html
It's possible to still reach the Grand Junction one from Moab, depending on equipment and location.. but there will be several headed out to Moab on Wednesday and I'm sure the connection will be fairly active with folks all headed out to Cruise Moab.
82 fj40, 99 uzj100, 06 gx470
97 DR650, 05 525EXC, 01 XT225, 89 TW200, 09 TTR125, 07 TTR90, 07 CRF50