My vote is for Colorado.

I went to a Valkyrie rally there a couple of years ago - a long haul from Toronto, but well worth it. I fell in love with the Rockies.

We stayed in Hot Sulphur Springs for a few days, and moved to Cortez for a few more.

Cortez is getting into the southern flattest and hottest part of Colorado, so I'd prefer to be
a bit farther east and/or north.

We spent nearly 2 weeks there, and didn't get to half of the places/roads we wanted to see.

My 2 cents.