Jim,

Zion NP is not to be missed.. it's a sandstone version of
Yosemite National Park.  You have to park and shuttle in, which
sucks a bit, but its not too bad really.

Do the "Angels Landing" hike, very cool..!

I've been to Bryce, if youre already at Zion, it's
worth the detour.  There's a cool hike you can do that
takes you in/around the hoodoos.

If you're headng up to the north, by way of Cayonlands/Arches
then by all means hit those.

The 'big ditch' er uh the Grand Canyon, is a bit of a sidetrip
from Utah.  North Rim is nice and less touristy that the
South Rim, but it's a ways off the main road from Jacob's
Lake, to get there.

A week (plus driving time) will be hard to choose. I'd pick
Bryce/Zion over Canyonlands/Arches myself, but really depends
upon your route.

 -tim

90 syncro westy
gilbert, az
www.timschneider.org