You said a week - one week. That being said I would stick with the Bryce, Zion, Arches and Capitol Reef. Zion my least favorite unless you are serious hikers because you go by bus down the canyon floor and look up - best part of the whole place is the drive in from the tunnel. We love all the others - been to them many times and will be back to Bryce this summer on way to OR.
One week - and with the travel time needed to get from one to the other - leaves you very little time so SEE them; you can say you were there but have will not really have seen them in all their beauty. But we do what we can, right!
We LOVE the UT NP's.