The prodigy would be a good choice too. The bag will be a bit more bulky than down, but quilt uses less insulation than a bag. I don't know the longevity of climashield.

You should talk to Tim Marshal regarding sizing. Slim might be too slim. Those are mostly designed to hammockers. People who sleep on the ground generally need a bit more width. Since you are kind of a tweener on the height and width either a reg/slim or a short/reg may work for you. The short fits 5'8" max and reg width may give you a bit of flexibility. Tim at EE is very responsive on these kind of questions.