In reply to philhilo:
HI I've done S Sixshooter, Looking Glass and Owl Rock. All great and would fit your criteria but different.
Sixshooter is a decent hike in and longer without a 4wd. Climbing is fun and easy apart from that one move. Hiking in could be horrible in the heat.
Looking GlassRock is very easy to access. 2 mins from the car and, as mentioned above only takes a couple of hours so beginning or end of day would work for the heat.
I'd go for LG.
Or Owl Rock maybe - 1 pitch of 5.9 - 2 mins from the road also.
Mountain Project for info.